题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习:gc textbook chapter 13 temperature and kinetic theory



 作者: admin   总分: 127分  得分: _____________

答题人: 匿名未登录  开始时间: 25年02月16日 19:56  切换到: 整卷模式

标记此题
1#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which has more atoms: 1 kg of iron or 1 kg of aluminum? See the peri(o7b*ga:/w gs*,yge1y uxjq nodic table or Appendix oyy(qgw7a /e:ug,1 gxj* bns*B.
参考答案:    

标记此题
2#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Name several properties of materials that could be exploited to make*s/pjpca( e i5i bawqm6j9w0y91xv( d a thermometer. (cjw01di9 / 9pm*biey5aqw6s pv(xa j
参考答案:    

标记此题
3#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which is larger, 1 C c ;h*c( ujik6l$^{\circ} $ or 1 F $^{\circ} $?
参考答案:    

标记此题
4#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
If system A is in thermal equilibrium with system B, but t xz949c:g) cr gby t1w 2p,pn41buyucB is not in thermal equilibrium tpzpycc9n)xc,1u ggr 1w bb:4u2t9y 4with system C, what can you say about the temperatures of A, B, and C?
参考答案:    

标记此题
5#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A flat bimetallic strip consists of aluminum riveted to a stk4 /jp xs9gh(v 28wgmbpu z/)drip of iron. When heated, the strip will bendg8p 2k)/(g4wusp/ bh vmdjz9x. Which metal will be on the outside of the curve? [Hint: See Table 13–1.] Why?
参考答案:    

标记此题
6#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
In the relation $\Delta$L = $\alpha$ $L_0$ $\Delta$T, should $L_0$ be the initial length, the final length, or does it matter? Explain.
参考答案:    

标记此题
7#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The units for the coefficiihy/ .36rqg bloh8e.rent of linear expansion $\alpha$ are $(C?)^{-1}$ and there is no mention of a length unit such as meters. Would the expansion coefficient change if we used feet or millimeters instead of meters? Explain.
参考答案:    

标记此题
8#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Figure 13–27 shows a diagram of a simple thermostat used to control a furuod 6 m:eir )aq(+;yzd qd67bxnace (or other head;b:7dua6i) qzq+d e or6y(mxting or cooling system). The bimetallic strip consists of two strips of different metals bonded together. The electric switch is a glass vessel containing liquid mercury that conducts electricity when it can flow to touch both contact wires. Explain how this device controls the furnace and how it can be set at different temperatures.
参考答案:    

标记此题
9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Long steam pipes that are fixed at the ends often have a section in f: 8c)pwsg- ;a yylzj;the shape of aa cyfl) s;:w8; -zgpjy U. Why?
参考答案:    

标记此题
10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A flat, uniform cylinder of lead floax+hyk r01 qcn4ts in mercury at 0 $^{\circ} $ C. Will the lead float higher or lower when the temperature is raised? Explain.
参考答案:    

标记此题
11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
When a cold mercury-in-glass thermoyj9ru .hh-+a fmeter is first placed in a hot tub of water, the mercuy f.-h rau+j9hry initially descends a bit and then rises. Explain.
参考答案:    

标记此题
12#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A glass container may break if one part of it is heated or cooled mocn8u;rx (mvl c4zab7 cu)(kl2re rapidly than adjacent parts. E(cx ( ;u)a24r7l 8zmk nlcuvcbxplain.
参考答案:    

标记此题
13#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The principal virtue of Pyrex gla(dgh.of+qy2/mkijx5-k. vh w ss is that its coefficient of linear expansion is much smaller than that for ordinary glass (Table 13–1). Explain why this gives rise to the increased heat resistance jgw.h q.o 2k/vy-5hf+kmxid(of Pyrex.

参考答案:    

标记此题
14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Will a grandfather clo-ruwepfm /0pnyq 9.8 tck, accurate at 20 $^{\circ} $ C, run fast or slow on a hot day (30 $^{\circ} $ C)? Explain. The clock uses a pendulum supported on a long, thin brass rod.
参考答案:    

标记此题
15#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Freezing a can of soda will cause its bottom and top to bulg69-2 7* tom vingulpyie so badly the can will not stand up. What has happeneng*p ui9i-o2 m76l tvyd?
参考答案:    

标记此题
16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
When a gas is rapidly compressedtsi:*b xhrg rgm;5.i ; (say, by pushing down a piston), its temperature increases. When a gas expands b:isgrxt *irh;m g 5.;against a piston, it cools. Explain these changes in temperature using the kinetic theory, in particular noting what happens to the momentum of molecules when they strike the moving piston.
参考答案:    

标记此题
17#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Will the buoyant force on an aluminum sphere submergebea u 066-ij)aecch8id in water increase or decrease if the temperature is increa6-jaiuece i0 b6cha)8sed from 20 $^{\circ} $ C to 40 $^{\circ} $ C?
参考答案:    

标记此题
18#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Explain in words how Charles’s law follows from kinetic theory and the relatz ag.-b ( rtef-vp3bf 1ef) rm3whim23ion befz2 3vfh3-t3mb(ib.eew rga1pr - mf)tween average kinetic energy and the absolute temperature.
参考答案:    

标记此题
19#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Explain in words how kw-bld;jly( h1-w g9bek)d *qGay-Lussac’s law follows from kinetic theory.
参考答案:    

标记此题
20#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
As you go higher in the Earth’s atmosph4wc +cql:f8 /:dug abkere, the ratio of $N_2$ molecules to $O_2$ molecules increases. Why?
参考答案:    

标记此题
21#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Escape velocity for the Earth +7fioizv r ..v bltv6;refers to the minimum speed an object must have to leave the Earth and never return. The escape velocity vzlt6i;.vfibo.v+r 7 for the Moon is about one-fifth what it is for the Earth due to the Moon’s smaller mass. Explain why the Moon has practically no atmosphere.
参考答案:    

标记此题
22#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Alcohol evaporates more qui(t wg.tu5-vb9jj* h ;i ;umccickly than water at room temperature. What can you infer about the molecular propertiebgcmju ici jt5(u ;9.-vt;h*ws of one relative to the other?
参考答案:    

标记此题
23#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Explain why a hot humid day is far more uncomfortable than a hot dry day at:njs ny:-y l)n the same tem ljy:n s):n-ynperature.
参考答案:    

标记此题
24#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Is it possible to boil water aw-l f5/n)190a saefonngq :wzt room temperature (20 $^{\circ} $ C) without heating it? Explain.
参考答案:    

标记此题
25#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Consider two days when the a6xbh, en 4ke/g- u( 2jyg2gzutlno4a4ir temperature is the same but the humidity is different. Which is more dense, the dry air or the humid air at4oug2-leeax, ugn k n4z62b4/h tj (gy the same T? Explain.
参考答案:    

标记此题
26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Explain why it is dangerous to open tuq4j s/; tsu)*qtkdi+ he radiator cap of an overheated automobile engine.dkqj+ /s 4;stitq u)u*
参考答案:    

标记此题
27#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Why does exhaled air appear as a little wxe7y9,k 3s4amd uq2hv hite cloud in the winter (Fig. 13–28)?
参考答案:    

标记此题
28#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How many atoms are there in a 3.4-gram y9 lbvl5v6,a 23 jqeapcopper penny?   $ \times10^{22}$ atoms of Cu

参考答案:     查看本题详细解析

标记此题
29#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How does the number of atoms in a 26.5-gram gold rilht8u)u to:3 gng compare to the number in a silver ring og:u)hltt 8o3u f the same mass?$N_{Au}$ =    $N_{Ag}$

参考答案:     查看本题详细解析

标记此题
30#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  “Room temperature” is often taken to be 68°F. What is this on the Celsius u*;iog ef;fh0 dq/rg5 scale? 0 ;;ifr5dqgh /u*foeg   $^{\circ} $ C
(b) The temperature of the filament in a lightbulb is about 1800 $^{\circ} $ C. What is this on the Fahrenheit scale?    $^{\circ} $ F

参考答案:     查看本题详细解析

标记此题
31#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Among the highest and lowest temperatures recordewp)wwr+.or hk. d9b+f d are 136 $^{\circ} $F in the Libyan desert and -129 $^{\circ} $F in Antarctica. What are these temperatures on the Celsius scale?high =    $^{\circ} $ C
low =    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
32#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) 15 $^{\circ} $ below zero on the Celsius scale is what Fahrenheit temperature?    $^{\circ} $ F
(b) 15 $^{\circ} $ below zero on the Fahrenheit scale is what Celsius temperature?   $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
33#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In an alcohol-in-glass thermometer, the alcohol column v w4;a*vze)yl53) udtk itr4n has length 11.82 cm at 0.0z t n;y4 va)liu*54)kved w3tr $^{\circ} $ C and length 22.85 cm at 100.0 $^{\circ} $ C. What is the temperature if the column has length
(a) 16.70 cm,    $^{\circ} $ C
(b) 20.50 cm?    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
34#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A concrete highway is built of slabs 12 m long (lrl,;jq 8 r-vw20 $^{\circ} $ C). How wide should the expansion cracks between the slabs be (at 20 $^{\circ} $ C) to prevent buckling if the range of temperature is -30 $^{\circ} $ C to +50 $^{\circ} $ C?    m

参考答案:     查看本题详细解析

标记此题
35#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Super Inva$^{TM}$, an alloy of iron and nickel, is a strong material with a very low coefficient of linear expansion [0.2$ \times10^{ -6}$(C?)$^{-1}$]
A 2.0-m-long tabletop made of this alloy is used for sensitive laser measurements where extremely high tolerances are required. How much will this table expand along its length if the temperature increases 5.0 $^{\circ} $ C? Compare to tabletops made of steel.   $ \times10^{-6 }$ m    $ \times10^{-4 }$ m

参考答案:     查看本题详细解析

标记此题
36#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The Eiffel Tower (Fig. 13–29) is built of wrought iron ap euvgd j2)/n ,pqr0t(zjq.x*bproximately 300 m tall. Estimate how much its height changes between July (average.jp*unt(ge q2qjb /vd x0r, )z temperature of 25°C) and January (average temperature of 2 $^{\circ} $ C). Ignore the angles of the iron beams, and treat the tower as a vertical beam.    m

参考答案:     查看本题详细解析

标记此题
37#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  To make a secure fit, rre*w3u yoc8 q5ivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. A steel rivet 1.871 cm in diameter is to be placed ino ue*5wr3yc8 q a hole 1.869 cm in diameter at 20 $^{\circ} $ C. To what temperature must the rivet be cooled if it is to fit in the hole?    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
38#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The density of water at xt2jrp1hqlk2f 8 ,-va30ysdg 4 $^{\circ} $ C is $ 1\times10^{3 }kg/m^3$ What is water’s density at 94 $^{\circ} $ C?    kg/$m^3$

参考答案:     查看本题详细解析

标记此题
39#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A quartz sphere is 8.75 cm in diamhga 8 n5iwemiw.49 r 5.f*dnxketer. What will be its change in volume if it is heated from *r 4nfeidnk5g5 x.w.ah98wmi30 $^{\circ} $ C to 200 $^{\circ} $ C?    $ \times10^{ -2}cm^3$

参考答案:     查看本题详细解析

标记此题
40#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ordinary glass is filled to 80wr 63w og1l*lvzzu *h3px lsthe brim with 350.0 mL of water at 100.0$^{\circ} $ C. If the temperature decreased to 20.0 $^{\circ} $ C, how much water could be added to the glass?    mL

参考答案:     查看本题详细解析

标记此题
41#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It is observed that 55.50 m z56ct) zj-wndL of water at 20 $^{\circ} $ C completely fills a container to the brim. When the container and the water are heated to 60 $^{\circ} $ C, 0.35 g of water is lost. (a) What is the coefficient of volume expansion of the container?    $ \times10^{-5 }$ /$C^0$(b) What is the most likely material of the container? The density of water at 60°C is 0.98324g/ml.

参考答案:     查看本题详细解析

标记此题
42#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) A brass plug is to be placed in a ring made hnj3bl c6ie m;wiv l0(ok: p82of iron. At 20 $^{\circ} $ C, the diameter of the plug is 8.753 cm and that of the inside of the ring is 8.743 cm. They must both be brought to what common temperature in order to fit?    $^{\circ} $ C
(b) What if the plug were iron and the ring brass?    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
43#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
If a fluid is contained in a long, narrow vessel so it can expand in essentialihvg6 hl3u8+xly one direction only, show that the effective coefficient of linear expansion is approximately equal to the coeffici6luxh 3g +8vhient of volume expansion $\beta$.
参考答案:    

标记此题
44#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
(a) Show that the change in the denv s e kc2l6h1t8gw+c/hsity $\rho$ of a substance, when the temperature changes by $\Delta$T is given by $\rho$ = -$\beta$$\rho$$\Delta$T
(b) What is the fractional change in density of a lead sphere whose temperature decreases from 25 $^{\circ} $ C to -40 $^{\circ} $ C?
参考答案:    

标记此题
45#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
A uniform rectangular2j99icjdewb , gyhhy8 bd;+r ; plate of length l and width w has coefficient of linear expan+ ybdrw ;g;i2eh 8 jyjh9cd9b,sion $\alpha$ Show that, if we neglect very small quantities, the change in area of the plate due to a temperature change $\Delta$T is $\Delta$A = 2$\alpha l w$$\Delta$T See Fig. 13–30.

参考答案:    

标记此题
46#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Show that for an isotrophe6y2 px19fg pic solid, $\beta$ = 3$\alpha$ if the amount of expansion is small. $\beta$ and $\alpha$ are the coefficients of volume and linear expansion, respectively. [Hint: Consider a cubical solid, and neglect very small quantities. See also Problem 18 and Fig. 13–30.]

参考答案:    

标记此题
47#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The pendulum in a grandfather clock iuor o4td .uaxf .o o3hr42i3(7mvl +cps made of brass and keeps perfect time at 14x.3v47rtaf2ohcpo i(r+ .lmodo u3 u7 $^{\circ} $ C. How much time is gained or lost in a year if the clock is kept at 25 $^{\circ} $ C? (Assume the frequency dependence on length for a simple pendulum applies.)$\approx$    min(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
48#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) The tube of a mercury thermometer has an inside diameter of 0.140 ezx5xri 1zt,53cj h h/mm. The bu/e,t5z ix3hx1 chrz5j lb has a volume of 0.255 $cm^3$ How far will the thread of mercury move when the temperature changes from 11.5 $^{\circ} $ C to 33.0 $^{\circ} $ C? Take into account expansion of the Pyrex glass.    cm(b) Determine a formula for the length of the mercury column in terms of relevant variables. Ignore tube volume compared to bulb volume.

参考答案:     查看本题详细解析

标记此题
49#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 23.4-kg solid aluminum cylindrical wheel of radius7kw c nj.6 cdtn5l *9zxrft5jb 6y).ek 0.41 m is rotating about its axle on frictionless bearings wit9.r nt zc).6 5l d b7kx*6yftcnewkj5jh angular velocity $\omega$ = 32.8 rad/s If its temperature is now raised from 20.0 $^{\circ} $ C to 75.0 $^{\circ} $ C, what is the fractional change in $\omega$?   

参考答案:     查看本题详细解析

标记此题
50#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An aluminum bar has the desired length when at 15°C.qibn 6 )3yl:-twu vy:l How much stress is required to keep it at this length llyq:6u)w-inbt3y:vif the temperature increases to 35 $^{\circ} $ C?    $ \times10^{7 }$ N/$m^2$

参考答案:     查看本题详细解析

标记此题
51#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
(a) A horizontal steel I-beam of cross-sectionalba5y t gjw jv7-at()5f area 0.041$m^2$ is rigidly connected to two vertical steel girders. If the beam was installed when the temperature was 30$^{\circ} $ C, what stress is developed in the beam when the temperature drops to -30 $^{\circ} $ C (b) Is the ultimate strength of the steel exceeded? (c) What stress is developed if the beam is concrete and has a cross-sectional area of 0.13$m^2$ Will it fracture?
参考答案:    

标记此题
52#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A barrel of diameter 13zju rx1n2vv)ew eu6q1j bf+ ,*4.122 cm at 20$^{\circ} $ C is to be enclosed by an iron band. The circular band has an inside diameter of 134.110 cm at 20$^{\circ} $ C. It is 7.4 cm wide and 0.65 cm thick.
(a) To what temperature must the band be heated so that it will fit over the barrel? $\approx$   $^{\circ} $ C(Round to the nearest integer)
(b) What will be the tension in the band when it cools to 20$^{\circ} $ C?    N

参考答案:     查看本题详细解析

标记此题
53#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What are the following temperatures on the Kelvin scald; nh56jsiks42s ;lc ; yke-hne:
(a) 86$^{\circ} $ C,    K
(b) 78$^{\circ} $F,    K
(c) -100$^{\circ} $C    K
(d) 5500°C,    K
(e) -459$^{\circ} $F    K

参考答案:     查看本题详细解析

标记此题
54#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Absolute zero is what temperature on the Fahrenheit sca dwj/ :+7dzsyole?    $^{\circ} $ F

参考答案:     查看本题详细解析

标记此题
55#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Typical temperatures in the interior of the Ea e+rm*43ssf7xgyp6i 9md ,xrorth and Sun are about 4000$^{\circ} $ C and $ \times10^{6 }$ $^{\circ} $ C respectively.
(a) What are these temperatures in kelvins?    K    $ \times10^{ 6}$K
(b) What percent error is made in each case if a person forgets to change $^{\circ} $ C to K? $\approx$    %(Round to the nearest integer) $\approx$    %(Round to three decimal places)

参考答案:     查看本题详细解析

标记此题
56#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 3 $m^2$ of a gas initially at STP is placed under a pressure of 3.20 atm, the temperature of the gas rises to 38.0$^{\circ} $ C. What is the volume?    $m^3$

参考答案:     查看本题详细解析

标记此题
57#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In an internal combustion engine, air at atmospheric pressure and a temperatureue2gl(9bwj3n ry8y i. of aboie 8n (yby. j3l2gwru9ut 20$^{\circ} $C is compressed in the cylinder by a piston to $\frac{1}{9}$ of its original volume (compression ratio = 9.0). Estimate the temperature of the compressed air, assuming the pressure reaches 40 atm.    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
58#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the density ofhhlr,:b w6gd( oxygen at STP using the ideal gas law.    kg/$m^3$

参考答案:     查看本题详细解析

标记此题
59#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A storage tank contains 2198uij4 od5 mdn.6 kg of nitrogen ($N_2$) at an absolute pressure of 3.65 atm. What will the pressure be if the nitrogen is replaced by an equal mass of $CO_2$    atm

参考答案:     查看本题详细解析

标记此题
60#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A storage tank at STP contains 7 lg30flz nce018.5 kg of nitrogen ($N_2$)
(a) What is the volume of the tank? $\approx$   $m^3$(“Round to one decimal places)
(b) What is the pressure if an additional 15.0 kg of nitrogen is added without changing the temperature?    $ \times10^{5 }$Pa    atm

参考答案:     查看本题详细解析

标记此题
61#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 18.75 mol of helium gas is at b whivxvtd683-r)k(i 10.0$^{\circ} $C and a gauge pressure of 0.350 atm, (a) calculate the volume of the helium gas under these conditions.    $m^3$
(b) Calculate the temperature if the gas is compressed to precisely half the volume at a gauge pressure of 1.00 atm.    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
62#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the pressure inside a z xhl5u2u. .ab35.0-L container holding 105.0 kg of argon gas at 385uahlz.2 5. xub K?   $ \times10^{ 8}$Pa

参考答案:     查看本题详细解析

标记此题
63#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A tank contains 26.072r6 ;p lhswf4uh yar9 kg of $O_2$ gas at a gauge pressure of 8.70 atm. If the oxygen is replaced by helium, how many kilograms of the latter will be needed to produce a gauge pressure of 7.00 atm?    kg He

参考答案:     查看本题详细解析

标记此题
64#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A hot-air balloon achieves its b sz 8kt:r8a;bzuoyant lift by heating the air inside the balloon, which makes it less dense than the air outside. Suppose ther8kzz8 s tb:a; volume of a balloon is 1800 $m^3$ and the required lift is 2700 N (rough estimate of the weight of the equipment and passenger). Calculate the temperature of the air inside the balloon which will produce the required lift. Assume that the outside air temperature is 0 $^{\circ} $ C and that air is an ideal gas under these conditions. What factors limit the maximum altitude attainable by this method for a given load? (Neglect variables like wind.) $\approx$    $^{\circ} $ C(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
65#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A tire is filled with air ato6njy.j cg(uj m(g9dx,p sv;r n+h(v p4a0b 7p 15 $^{\circ} $ C to a gauge pressure of 220 kPa. If the tire reaches a temperature of 38 $^{\circ} $ C, what fraction of the original air must be removed if the original pressure of 220 kPa is to be maintained?    %

参考答案:     查看本题详细解析

标记此题
66#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 61.5 L of oxygen at 18.poo5r9lxa5 c32y1xc k weoq/3o6:vd z 0 $^{\circ} $ C and an absolute pressure of 2.45 atm are compressed to 48.8 L and at the same time the temperature is raised to 50.0°C, what will the new pressure be?    atm

参考答案:     查看本题详细解析

标记此题
67#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A helium-filled balloon escapes a child’s hand at sea level and 2(ilr:;ud vvq wy :*e3j1hbt h*0.0 $^{\circ} $ C. When it reaches an altitude of 3000 m, where the temperature is 5.0 $^{\circ} $ C and the pressure is only 0.70 atm, how will its volume compare to that at sea level?    times the original volume

参考答案:     查看本题详细解析

标记此题
68#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the number of molv1dx5cju wwad3vb8np (r -80cecules / $m^3$ in an ideal gas at STP.    $ \times10^{25 }$ molecules /$m^3$

参考答案:     查看本题详细解析

标记此题
69#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How many moles of water are there in 1.000 L? How man p;h/8p;x kodjj,l n.xk/(yljy molecules?    mol    $ \times10^{25 }$ molecules

参考答案:     查看本题详细解析

标记此题
70#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the number of (a9kf mm;4v; sml) moles,    $ \times10^{22 }$ moles and (b) molecules of water in all the Earth’s oceans. Assume water covers 75% of the Earth to an average depth of 3 km. $\approx$    $ \times10^{46 }$ molecules

参考答案:     查看本题详细解析

标记此题
71#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cubic box of volumxb,l1, gar::.ue ggbj e 5.1$ \times10^{ -2}m^3$ is filled with air at atmospheric pressure at 20 $^{\circ} $ C. The box is closed and heated to 180 $^{\circ} $ C. What is the net force on each side of the box?    N

参考答案:     查看本题详细解析

标记此题
72#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate how many molecules of air are in each 2.0-L breath you inhado 35ei9 pwk .qyfbi31o ;cbp9le that were also in the last breath Gafoc3 1b9. yqopwe;b95iik dp 3lileo took. [Hint: Assume the atmosphere is about 10 km high and of constant density.]   $\frac{molecules}{breath}$

参考答案:     查看本题详细解析

标记此题
73#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) What is the average translational kineyrdra/7-u9 qqo2l 8(dg,hmbl tic energy of an oxygen molecule at STP?qdh dbmyoq9rrl l/ug 7( -2a8,    $ \times10^{-21 }$ J
(b) What is the total translational kinetic energy of 2.0 mol of $O_2$ molecules at 20 $^{\circ} $ C?   $ \times10^{3 }$ J

参考答案:     查看本题详细解析

标记此题
74#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the rms speed of helium atoms near the5 xg8ov/yri0dtln0:5 z(qiv bb19zc y surface of the Sun at a temperature of about 6000 g vzy1o58ltq icnzbrb : 0i(v9/yd0x5K.    m/s

参考答案:     查看本题详细解析

标记此题
75#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  By what factor will the rms speed of gas molecxqomr0r.u02x d624zy 9uo4j,epn8uei r k qt/ ules increase if the temperature is increased fromt rdrey006 2qxq48oru9 u2pk/ezu.jm4nxio , 0 $^{\circ} $ C to 100 $^{\circ} $ C?   

参考答案:     查看本题详细解析

标记此题
76#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A gas is at 20 $^{\circ} $ C. To what temperature must it be raised to double the rms speed of its molecules?    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
77#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Twelve molecules have the foll;lm +mmzz+qc.5 /po2z -ynmr bowing speeds, given in units of km/s: 6, 2, 4, 6, 0, 4, 1, 8, 5, 3, 7, and 8. Calculym q/m +zo mbrn+m2l- 5p;zcz.ate the rms speed. $v_{rms}$ =    km/s

参考答案:     查看本题详细解析

标记此题
78#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The rms speed of molej7,/y cozwmgo yi8: 1hcules in a gas at 20.0 $^{\circ} $ C is to be increased by 1.0%. To what temperature must it be raised?    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
79#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the pressure of a gas is doubled while its volume is he 3il:akvv )y :5ovls2pld constant, by what factorpiv35:)o:vl a vy l2ks does $v_{rms}$ change?   

参考答案:     查看本题详细解析

标记此题
80#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Show that the rms speed of moleculse95n;v j. u7dtp t5wdes in a gas is given by $v_{rms}$ = $\sqrt{3P\\rho}$ where P is the pressure in the gas, and $\rho$ is the gas density.
参考答案:    

标记此题
81#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Show that for a mixture of two gases at the same temperature, the ratio of ) c)e(l ajcsg6dhnk97 *4hbjctheir rms speeds is equal to the inverse ratio of the square roots of th6cl9ej hnjck( )74ashc b)g*d eir molecular masses.
参考答案:    

标记此题
82#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the rms speed of nitrogen molecules cz)c(:zf3bt+gz u, 58 fqausd nontained in an 8.5$-m^3$ volume at 2.1 atm if the total amount of nitrogen is 1300 mol?    m/s

参考答案:     查看本题详细解析

标记此题
83#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate (a) the rms speed of an oxygen moleculevb oh6txy 5karh 1+/*e at 0 $^{\circ} $ C    m/s
(b) determine how many times per second it would move back and forth across a 7.0-m-long room on the average, assuming it made very few collisions with other molecules.    round trips per sec

参考答案:     查看本题详细解析

标记此题
84#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the average distance between nitrogen molecules at STPvqiafna1keky5h8 t- krpa -,: )t e8;z?    $ \times10^{-9 }$m

参考答案:     查看本题详细解析

标记此题
85#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  (a) Estimate the rms speed of an amino acid whose molecular mass is 89 u i4nnk +hdbca2.n a living cell a .nhn d+24kacbt 37 $^{\circ} $ C.    m/s
(b) What would be the rms speed of a protein of molecular mass 50,000 u at 37 $^{\circ} $ C?    m/s

参考答案:     查看本题详细解析

标记此题
86#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Show that the pressure P of a gas can be written P =l iz,w-o8n ot8 $\frac(1)(3)\rho v^2$ where $\rho$ is the density of the gas and v is the rms speed of the molecules.
参考答案:    

标记此题
87#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The two isotopes of uranips)igy yr) )gx3v0 tq27 ;vcepum, $^{235}$U and $^{238}$U (the superscripts refer to their atomic mass), can be separated by a gas-diffusion process by combining them with fluorine to make the gaseous compound UF$_6$ Calculate the ratio of the rms speeds of these molecules for the two isotopes, at constant T.   

参考答案:     查看本题详细解析

标记此题
88#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
(a) At atmospheric pressure/z+ czqu;tc 4m, in what phases can $CO_2$ exist? (b) For what range of pressures and temperatures can $CO_2$ be a liquid? Refer to Fig. 13–21.
参考答案:    

标记此题
89#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Water is in which phase when the pressure is 0.01 atm and the temperatkj)n ls-u *(gjure is (a) 90 )lg(j-jkn*su $^{\circ} $ C, (b) -20 $^{\circ} $ C.
参考答案:    

标记此题
90#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the dew point (approximately) if the humidity is lvh/e li6:rd350% on a day when the temperature eh:d63vl/lriis 25 $^{\circ} $ C?$\approx$    $^{\circ} $ C(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
91#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the air pressure at a p(bbnc0p6edftedd;n g)/h 5p6lace where water boils at 90 $^{\circ} $ C?    torr    Pa    atm

参考答案:     查看本题详细解析

标记此题
92#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the air pressure at a particular place sd) )p-d wjr0:evve,sg 3zvo:in the mountains is 0.72 atm, estimate the temperature at whi)wvge3 j:do)e ,z0v:p svdsr-ch water boils. $\approx$ =    $^{\circ} $ C

参考答案:     查看本题详细解析

标记此题
93#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the temperature on a day when the partial pressure of water is 530 Pa 6vii:xpw 7ml ih; )qc2xc3nq2and the relative humc 3)2vip2qh 6c 7nxx:mlqw;iiidity is 40%? $\approx$ =    $^{\circ} $ C(Round to the nearest integer)

参考答案:     查看本题详细解析

标记此题
94#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the partial pressure of wa/k ft.q6 wrxq+ter on a day when the temperature is 25 $^{\circ} $ C and the relative humidity is 35%?    Pa

参考答案:     查看本题详细解析

标记此题
95#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the approximate pressure inside a pressure cookd 7hmkwt; 0quznxno ;wwtvn.))k- 8) cer if the water is boiling a) n7 tv;hw d uxwzn8k))won.;0 ct-kmqt a temperature of 120 $^{\circ} $ C? Assume no air escaped during the heating process, which started at 20 $^{\circ} $ C.    atm

参考答案:     查看本题详细解析

标记此题
96#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the humidity in a rooms d/o8+ dat2vz of volume 680$m^3$ at 25 $^{\circ} $ C is 80%, what mass of water can still evaporate from an open pan?    kg

参考答案:     查看本题详细解析

标记此题
97#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Air that is at its dew point ofitt3; 6c6o mip 5 $^{\circ} $ C is drawn into a building where it is heated to 25. What will be the relative humidity at this temperature? Assume constant pressure of 1.0 atm. Take into account the expansion of the air.    %

参考答案:     查看本题详细解析

标记此题
98#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the time needed for a glycine molecule (see Table 13–ulae)y zxxp-na5-t;ac4 1: bf4) to diffuse a distance oftz nb5 f1;c-4ulxa-ya)ap:xe 15 $\mu m$ in water at 20$^{\circ} $ C if its concentration varies over that distance from 1 mol/$m^3$ to 0.4 mol/$m^3$ Compare this “speed” to its rms (thermal) speed. The molecular mass of glycine is about 75 u. t $\approx$    s ([color=rgba(0, 0, 0, 0.85)]Round to one decimal places) $v_{diffuse}$    $ \times10^{ -5}$ m/s
$v_{rms}$    m/s


参考答案:     查看本题详细解析

标记此题
99#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Oxygen diffuses from the surface ofsh- . (ubkp:q; l.wfrb insects to the interior through tiny tubes calledb;u.lb (. :rk- pqhsfw tracheae. An average trachea is about 2 mm long and has cross-sectional area of $ 2\times10^{-9 } m^2$ Assuming the concentration of oxygen inside is half what it is outside in the atmosphere,
(a) show that the concentration of oxygen in the air (assume 21% is oxygen) at 20$^{\circ} $ C is about 8.7 mol/$m^3$ then $\approx$    mol/$m^3$(Round to one decimal places)
(b) calculate the diffusion rate J,    $ \times10^{-11 }$ mol/s
(c) estimate the average time for a molecule to diffuse in. Assume the diffusion constant is $ 1\times10^{-5 } m^2/s$    s

参考答案:     查看本题详细解析

标记此题
100#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A precise steel tape z9sjq0l ha(o a6 j5d7;+amuat measure has been calibrated at 20$^{\circ} $C. At 34$^{\circ} $C,
(a) will it read high or low,
(b) what will be the percentage error?    $ \times10^{-4 }$ %

参考答案:     查看本题详细解析

标记此题
101#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A precise steel tape measure has been calibr; -l m*s-ospkfated at 20$^{\circ} $C. At 34$^{\circ} $C,
(a) will it read high or low,
(b) what will be the percentage error?    $ \times10^{-4 }$ %

参考答案:     查看本题详细解析

标记此题
102#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A Pyrex measuring cup was calibrated at norm*v9; g+nnrnnb4lo tb)al room temperature. How much error will be made in a recipe calling for 300 mL of cool watvbnb)nn n 4r+g9otl* ;er, if the water and the cup are hot, at 80$^{\circ} $C, instead of at 20$^{\circ} $C? Neglect the glass expansion.$\approx$    ml

参考答案:     查看本题详细解析

标记此题
103#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The gauge pressure in a heliu,yn8jgq k+rhq .cvs.-m gas cylinder is initially 28 atm. After many balloons have been blown up, the gauge pressure has decreased to 5 atm.vrj gy8hc., nq- qks+. What fraction of the original gas remains in the cylinder?   

参考答案:     查看本题详细解析

标记此题
104#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the number of air molecules in a room of lengz5i mj tfzwj.85g/c*hth 6.5 m, width 3.1 m, and height 2.5 m. Assume the t5hc zz8gmj.w5jf/ t*i emperature is 22$^{\circ} $C. How many moles does that correspond to?    $\times10^{27 }$ molecules    moles

参考答案:     查看本题详细解析

标记此题
105#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In outer space the den.y71c8t*zp mwca 6r8ek l1ap) jqyze3sity of matter is about one atom per $cm^3$ mainly hydrogen atoms, and the temperature is about 2.7 K. Calculate the rms speed of these hydrogen atoms, and the pressure (in atmospheres).$v_{rms}$ =    m/s    $ \times10^{-22 }$ atm

参考答案:     查看本题详细解析

标记此题
106#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The lowest pressure di+5x0 zsg5(dclx0lgx *oim8 attainable using the best available vacuum techniques is aboutd80 ml 5xd+ g0 i*gxxl5o(czis $10^{-12} N/m^2$ At such a pressure, how many molecules are there per $cm^3$ at 0$^{\circ} $C?    $\frac{molecules}{cm^3}$

参考答案:     查看本题详细解析

标记此题
107#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a scuba diver fills his lungs to full capacity of 5.5 L when 10 m below thuglu-3o:9 xbtx-zy4iv 6de a* e surface, to what volume would his lungs expand y6x4iu3gt ov:z*- d- u9el axbif he quickly rose to the surface? Is this advisable?    L

参考答案:     查看本题详细解析

标记此题
108#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A space vehicle returning from the Moon enters *v,5kp)nh c ylEarth’s atmosphere at a speed of about 40,000 km/h Molecules (assume nitrogen) striking the nose of the vehicle with this speed correspond to what temperature? (Because of this high temperature, the nose of a space vehicle must be made of special materials; indeed, part of it does hn,5cp )*lk vyvaporize, and this is seen as a bright blaze upon reentry.)    K

参考答案:     查看本题详细解析

标记此题
109#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The temperature of am k.vp(daz4ab9 lhw.-n ideal gas is increased from 110$^{\circ} $C to 360$^{\circ} $C while the volume and the number of moles stay constant. By what factor does the pressure change? By what factor does $v_{rms}$ change?$\frac{P_2}{P_1}$ =    $\frac{(v_{rms})_2}{(v_{rms})_1}$ =   

参考答案:     查看本题详细解析

标记此题
110#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A house has a volume ofha8mfn mw ;8n- 770m$^2$ (a) What is the total mass of air inside the house at 20$^{\circ} $C?    kg
(b) If the temperature drops to -10$^{\circ} $C what mass of air enters or leaves the house?    kg

参考答案:     查看本题详细解析

标记此题
111#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  From the known value of atmospheric pressure at the surface of the Earth, e2 42kdwf7pyjn stimate the to wypkj fn72d42tal number of air molecules in the Earth’s atmosphere.    $ \times10^{44 }$ molecules

参考答案:     查看本题详细解析

标记此题
112#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the rms speed of nitrogen molecules c*hyy tva18f 9zontained in a 7.6$-m^3$ volume at 4.2 atm if the total amount of nitrogen is 1800 mol?    m/s

参考答案:     查看本题详细解析

标记此题
113#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A standard cylinder of oxydca(53ushsfg fi4v0x.e-jxm, -i8u j gen used in a hospital has gauge pressure = 2000 psi (13,800 kPa) and at T = 25sxu -ac843( hjf-gs.0xvim fj5ue d,i 9K How long will the cylinder last if the flow rate, measured at atmospheric pressure, is constant at 2.4 L/min. $\approx$    hour

参考答案:     查看本题详细解析

标记此题
114#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An iron cube floats in p;tn:maa eula k/3l, lsy2e7) a bowl of liquid mercury at 0$^{\circ} $C. (a) If the temperature is raised to 25$^{\circ} $C, will the cube float higher or lower in the mercury? 
(b) By what percent will the fraction of volume submerged change?    %

参考答案:     查看本题详细解析

标记此题
115#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The density of gasoline at2s)z/gd:aqmwo j1 n)g 0$^{\circ} $C is 0.68$ \times10^{3 }kg/m^3$ What is the density on a hot day, when the temperature is 38$^{\circ} $C?    kg/$m^3$
What is the percentage change?    %

参考答案:     查看本题详细解析

标记此题
116#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a steel band were tejd qeqt5-s+p v5j5(ts t g)a-o fit snugly around the Earth’s equator at 25$^{\circ} $C, but then was heated to 45$^{\circ} $C, how high above the Earth would the band be (assume equal everywhere)?    m

参考答案:     查看本题详细解析

标记此题
117#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A brass lid screws tightly onto a glass jar at 2( yo :u;anw/fs1 d2scb0$^{\circ} $C. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperatures of the lid and the jar are both 60$^{\circ} $C. The inside diameter of the lid is 8.0 cm at 20$^{\circ} $C. Find the size of the gap (difference in radius) that develops by this procedure.    cm

参考答案:     查看本题详细解析

标记此题
118#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The first length standard, adop zctb0x q kwq7)5eqe-6ted in the 18$^{th}$ century, was a platinum bar with two very fine marks separated by what was defined to be exactly 1 m. If this standard bar was to be accurate to within $\pm1.0 \mu m$ how carefully would the trustees have needed to control the temperature? The coefficient of linear expansion for platinum is $ 9\times10^{ -6}C/^{-1}$. $\pm$ =    C$^{\circ} $

参考答案:     查看本题详细解析

标记此题
119#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A scuba tank, when fully charged, has a pressure of 195 atm at 209 ct72t xw*pek$^{\circ} $C. The volume of the tank is 11.3 L.
(a) What would the volume of the air be at 1.00 atm and at the same temperature?    L
(b) Before entering the water, a person consumes 2.0 L of air in each breath, and breathes 12 times a minute. At this rate, how long would the tank last?    min
(c) At a depth of 20.0 m of sea water and temperature of 10$^{\circ} $C, how long would the same tank last assuming the breathing rate does not change?    min

参考答案:     查看本题详细解析

标记此题
120#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The escape speed from the Earth u ,(y1nir)x-zlouw62 tkvj ( 5 gaf6tbis $ 1.12\times10^{4 } m/s$ so a gas molecule travelling away from Earth near the outer boundary of the Earth’s atmosphere would, at this speed, be able to escape from the Earth’s gravitational field. At what temperature is the average speed of
(a) oxygen molecules,    $ \times10^{5 }$K
(b) helium atoms equal to $ 1.12\times10^{4 } m/s$    $ \times10^{4}$K
(c) Can you see why our atmosphere contains oxygen but not helium?

参考答案:     查看本题详细解析

标记此题
121#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1.0-kg trash-can lid f7 ja-h.cgmhli* ix/;is suspended against gravity by tennis balls thrown vertically upward at it. How many tennis balls per second must re* c ga/ h-;mji.lx7hifbound from the lid elastically, assuming they have a mass of 0.060 kg and are thrown at 12m/s   balls/s

参考答案:     查看本题详细解析

标记此题
122#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A scuba diver releases afnoeqh; .s3-22/taado; cwqd 3.00-cm-diameter (spherical) bubble of air from a depth w; h /aqtad3.f2oqs2n;c -edo of 14.0 m in a lake. Assume the temperature is constant at 298 K, and the air behaves as a perfect gas. How large is the bubble when it reaches the surface?    cm

参考答案:     查看本题详细解析

标记此题
123#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the total water vapor pressure in the air on the following76ff3auu n+q m two days: m3n f6af7u+qu
(a) a hot summer day, with the temperature 30$^{\circ} $C and the relative humidity at 40%;    Pa
(b) a cold winter day, with the temperature 5$^{\circ} $C and the relative humidity at 80%.    Pa

参考答案:     查看本题详细解析

标记此题
124#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sauna has 7$m^3$ of air volume, and the temperature is 90$^{\circ} $C. The air is perfectly dry. How much water (in kg) should be evaporated if we want to increase the relative humidity from 0% to 10%? (See Table 13–3.)    kg


参考答案:     查看本题详细解析

标记此题
125#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the percent difference in the density of iron at STP, and when ix8(ez((xazs qt is a solid dz(z( aqx s8ex(eep in the Earth where the temperature is 2000$^{\circ} $C and under 5000 atm of pressure. Assume the bulk modulus (90$\times 10^9N/m^2$) and the coefficient of volume expansion do not vary with temperature and are the same as at STP.    %  

参考答案:     查看本题详细解析

标记此题
126#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
(a) Use the ideal gas law to 6r o/haat/ p(dm- f/enshow that, for an ideal gas at constant pressure, the coefficient of eat6opahm (r/-/fn /dvolume expansion is equal to $\beta$ = 1/T where T is the temperature in kelvins. Compare to Table 13–1 for gases at T = 293K (b) Show that the bulk modulus (Section 9–5) for an ideal gas held at constant temperature is B = P where P is the pressure.
参考答案:    

标记此题
127#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In humid climates, people consk f7(xlr xq0u/ v4sutt+3sw d)p78ahatantly dehumidify their cellars to prevent rot and mildew. If the cella3vrq0 l7 u4(f pusksdtth /7xaw+x8 )ar in a house (kept at 20$^{\circ} $C) has 95 $m^2$ of floor space and a ceiling height of 2.8 m, what is the mass of water that must be removed from it to drop the humidity from 95% to a more reasonable 30%?    kg

参考答案:     查看本题详细解析

  • :
  • 总分:127分 及格:76.2分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 127 道题
    本系统支持习题练习,作业与考试三大模式,作业考试自动评分,成绩排序一键导出,可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

    浏览记录|手机版首页|使用帮助|题库网 (https://tiku.one)

    GMT+8, 2025-7-11 16:37 , Processed in 0.338677 second(s), 276 queries , Redis On.