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:Physics Unit10: Fluids Related Topics



 作者: admin   总分: 80分  得分: _____________

答题人: 匿名未登录  开始时间: 22年07月29日 13:02  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The three common phases of m:sdwc *a hz*qvfg*:(j atter are

参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Density is

参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Substance A has a densitybf+g,org l +)j of $3.0 \; g/cm^{3}$ and substance B has a density of $4.0 \; g/cm^{3}$. In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure is

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is not a unit of press8 pisbhu9/8 gmure?

参考答案:    

标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three drinki8ymc 2 nz(,qvong glasses. All three have the same area base, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, co,qzynm2(8 v and so holds more water than A. Glass C is narrower at the top than at the bottom, and so holds less water than A. Which glass has the greatest liquid pressure at the bottom?

参考答案:    

标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the difference between the p )4 t u*k.3cjimwhb(mxlw-f0oressures inside and outside a tire called?

参考答案:    

标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When atmospheric pressure changes, what happens to tmsv+qbbpc ((+y+ua:f f rm*b,he absolute pressure at the bottom of a pool?:(+b*m a,fbv rf(+ms ypq u+cb

参考答案:    

标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are originally 1.0 m beneath the surface of a pool.;na-vqrxc.rqjy vgm6.) 9 qz. If you dive to 2.0 m beneath the surface, what happens to the absolute prm ;vygzn qx-av. .6jqq.rrc)9essure on you?

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  
State Pascal's principle.39wfb 8frir:vta + fz0
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  
State Archimedes' princigyn/0s; c6j du xgd6t,ple.
参考答案:    

标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  $50 \; cm^{3}$ of wood is floating on water, and $50 \; cm^{3}$ of iron is totally submerged. Which has the greater buoyant force on it?

参考答案:    

标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As a rock sinks deeper and deeper into water of coikv:8h0c 1qkmym7 p**aat v+znstant density, what happens to1 7*i0 8ycv*tkk mvh pmqza:a+ the buoyant force on it?

参考答案:    

标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Salt water has greater density than fresh wak6t1t2q8 uxdeox* j z(ter. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on th* k(x x uo18dt6zqe2jte boat?

参考答案:    

标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Salt water is more dense t8pt b8r.-j vna4ekez+ han fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of watereb.r p8-kent4+ vj8az displaced in the salt water is

参考答案:    

标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A steel ball sinks in water but floats in a pool of mercury. Where ish.4g/to - utph the buoyant force op.-ou gth/4 thn the ball greater?

参考答案:    

标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-kg piece of aluminum sits at th hpm4d32 f.wnd (lyoo;e bottom of a lake, right next to a 10-kg piece of lead. Which has the greater buoyant fohmdopd wofy3n; 2l(.4 rce on it?

参考答案:    

标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of iron rests on top of a piece of wood xtmyy nhskk/9,; m)lh bl,d(+floating in a bathtub. If the iron+ nk( x;,h, md hsyb)tk/9ymll is removed from the wood, what happens to the water level in the tub?

参考答案:    

标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of wood is floating in a bathtub. A second piece of wood sits on srn2 ej,t0)il top of the first piece, and does not touch the water. If the top piece is s r0n, lej)2titaken off and placed in the water, what happens to the water level in the tub?

参考答案:    

标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a pipe. The diameter of the pipe at point B is larger tha1 h.skx l1 dg3wb4.4tmqapi(an at point A. Where is the speed of the water great 4(1 sdlkaqib.1mhwpx34 tag.er?

参考答案:    

标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe widens6,t,8vili mbhq r48w(hg nyj/2o( xv n to twice its original radius, what 2hhlyi 8mn(tv/rbvi (,4o j,n 8xwg6 qis the flow speed in the wider section?

参考答案:    

标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe narrows to hafc+mqbo)5 6g ulf its original radius, what 6bo5)fc g+muqis the flow speed in the narrower section?

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  
State Bernoulli's principlnr /zwb.:(n vse.
参考答案:    

标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which one of the following is associated w,3,d;ibnxo 9w: jswj1 xvl,p lith the law of conservation of energy bw,d1pn j,l 9i:3;j lx,oxsvwin fluids?

参考答案:    

标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the speed of a moving fluid incrg uhx +v5) /j-m*3fsiwzrh5ch eases, the pressure in the fluid

参考答案:    

标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a pipe. The diameter of the pipe at point B is larger thf1afaa22:d rh an at point A. Where isa2fhd r21 :aaf the water pressure greatest?

参考答案:    

标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When you blow some aiux :-w1r*n 8kqmy4xuj* cr (wer above a paper strip, the paper rises. This is because

参考答案:    

标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sky diver falls through the air at terminal velocity. Thqs0l e1a.nmdsj+:m j 0e force of air resistance on hiq: ej0aj+s1s.nmdm l0m is

参考答案:    

标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two Styrofoam balls, of radii R and 2R, are re*1xf7 c4x bofqleased simultaneously from a tall tower. Which will reach thex*xf71f4o cbq ground first?

参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a small spherical rock of radius r faipt,-0mqrqe ; lls through water, it experiences a drag f;qri pt 0me,q-orce $F=arv$, where $v$ is its velocity and $a$ is a constant proportional to the viscosity of water. From this, one can deduce that if a rock of diameter 2.0 mm falls with terminal velocity, $v$, then a rock of diameter 4.0 mm will fall with terminal velocity .

参考答案:    

标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which has the greatest effect on the flow of fluid through a narr , xy3xwntf5h4ow pipe? That is, if you m4 x,fxn 53wthyade a 10% change in each of the quantities below, which would cause the greatest change in the flow rate?

参考答案:    

标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two horizontal pipes are the same d j60u ah;tb+zlength, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the puhz6 dbj;a0t+ ipes. If the flow rate in pipe A is Q, what is the flow rate in pipe B?

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two horizontal pipes have the same diameter, but pipe B is twice as long a7tmnv 2s1 6fs41w; ljlzzox* hs pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If thz*6; znflm jxwsolv7t1h4s1 2e flow rate in pipe B is Q, what is the flow rate in pipe A?

参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When soup gets cold, it often tastes greasy. This "greatrw 0wq2 83tps6lfz7p sy" taste seems to be associated with oil spreading out all over the surface sz278lrp3wpf t t wq60of the soup, instead of staying in little globules. To us "physikers", this is readily explained in terms of

参考答案:    

标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a tube of diameter d is placed in water, the water rises to a heioho 9)fgbe-,t qc9.x/v x *hukght h. If the diameter were half as great, how high wobx* qtv.g eh fhx-/u ),ko9o9culd the water rise?

参考答案:    

标记此题
36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Certain insects, such as the water bug, are sufficiently lightweighn;*t593favlr 3ykrcv u3m g:ft that they can run on top of water without breaking the surface tension. Water bug A rv 5g333at*m n9 fu c:rkv;fylhas weight W. Water bug B is twice as big as bug A, in all dimensions. That is, bug B is twice as long, twice as wide, etc. What is the weight of bug B?

参考答案:    

标记此题
37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Certain insects, such as the water bug, are sufficiently lightweight that thk7 guyzc7z1v4ya /+eeey can run on top of water without breaking the surface tension. This is possible because the water, due to surface tension, exerts an upward force on the bottom of the bug's feet. Suppose that the maxim y+az41kve7egyzu/c7um possible upward force on the feet of water bug A is F. Now suppose that water bug B is twice as big as bug A in every dimension. That is, bug B is twice as long, twice as wide, etc. What is the maximum upward force on the feet of bug B?

参考答案:    

标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A plastic block of dimensions 2.00 cm x 3.00 cm x 4.00 cm has a yjexo(9sx(1/k o:bsc mass of 30.0 g. What is its density(/xky o:sb se9j1xoc( ?

参考答案:    

标记此题
39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A liquid has a specific gravity of 0.357. What is its densityi 9jj87bs(/-8 dp6ohg6ee e -v ikfsmn?

参考答案:    

标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A brick weighs 50.0 N, and measures 30.0 cm x 10.0 cm x 4ilw;b 71-c 6aycahnz6xnoq/ ; .00 cm. What is the maximum pressure it can exert on a horizont cnq z6n1bih xa;wy;lo7c-6/a al surface?

参考答案:    

标记此题
41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person weighing 900 N is standx z5fjq/sj82 ting on snowshoes. Each snowshoe has area $2500 \; cm^{2}$. What is the pressure on the snow?

参考答案:    

标记此题
42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much pressure (absolute) must a submarine withstand at a deprxsbld j8+c3gz fd: vxc+q*/ 2 r.nov(th of 120.0 m in th :r+cs*dv xfbl+.3rcx jn8 /2(oq gvzde ocean?

参考答案:    

标记此题
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular window of 30 cm diameter in a submarine can w7d/n yxsr2v:4g b uqi;ithstand a maximum forcexny:gbdq 4v2ri;s/u7 of $5.20 \times 10^{5} \; N$. What is the maximum depth in a lake to which the submarine can go without damaging the window?

参考答案:    

标记此题
44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the gauge pressure if the absolute pref xo 5*(qr, :z6yxibgwssure is 300 kPa?

参考答案:    

标记此题
45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the gauge pressure at a location 15.0 m below thei x8sgfg+po.zn 4 d,2i surface of sea? (The densi2 8z4o+ pixf.gid,sngty of seawater is $1.03 \times 10^3 \; kg/m^{3}$.)

参考答案:    

标记此题
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the absolute pressure at a location 15.u g5lcgdfi5w:snte g (j 0heo u/8:1g)0 m below the surface of sea? (The density of seawater is:j :/eg ts5fgl(0 wd1 5hunuggiec8 )o $1.03 \times 10^3 \; kg/m^{3}$.)

参考答案:    

标记此题
47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 500-N weight sits on thk8(- 0)k 5dgt9x9bwsx lonohe e small piston of a hydraulic machine. The small piston gost9beko5w)h 0d8xnx -k (9lhas area $2.0 \; cm^{2}$. If the large piston has area $40 \; cm^{2}$, how much weight can the large piston support?

参考答案:    

标记此题
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a hydraulic garage lift, the small piston has a radius of 5.0 cm and the ay3, 32eees,w7vhgk:jg - zph large piston has a radius of 15 cm. What force must, 73gy vs,ghz e-:a3j2eepw kh be applied on the small piston in order to lift a car weighing 20,000 N on the large piston?

参考答案:    

标记此题
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 13,000 N vehicle is to be lifted by a 25 cm diameter hydraulic piston. g6t l3v*og*;iks .lo) e5m rno cjdpo77*vh x,What force nooj.g ;pl67s7g3h,*5ro kmi*edn vxc t*vlo)eeds to be applied to a 5.0 cm diameter piston to accomplish this?

参考答案:    

标记此题
50#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large f 36yn0o s95kvcydph-piston has a diameter of 40 cm. The lift raises yn06c dp93 syv5-kfhoa load of 15,000 N.
(a) Determine the force that must be applied to the small piston    $N$ (fill in numerical value only)
(b) Determine the pressure applied to the fluid in the lift    $\times 10^5 \; Pa$ (fill in numerical value only)

参考答案:    

标记此题
51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A block of metal weighs 40 N in air and 30 N in water. What is the mat)6jo prlw43af2h (-m:voh buoyant force of thewaj3 6f:a-2 ho(h lortmv p4m) water?

参考答案:    

标记此题
52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object has a volume o tj( ;60w2mvymt( *ag0k bckdsf $4.0 \; m^{3}$ and weighs 40,000 N. What will its weight be in water?

参考答案:    

标记此题
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.00-kg cylinder ofejgg io6hnh/ s- czed9)::uv 3 solid iron is supported by a string while submerged in water. Whi3 ):h/egj6cdz-seu:n o v9h gat is the tension in the string? (The specific gravity of iron is 7.86.)

参考答案:    

标记此题
54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the density of gold isjn3ffhu4dp 9 4ch57ss $19.3 \times 10^3 kg/m^{3}$, what buoyant force does a 0.60-kg gold crown experience when it is immersed in water?

参考答案:    

标记此题
55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A crane lifts a steel submarine (0t+ b-ruzzx5 odensity = $7.8 \times 10^3 \; kg/m^{3}$) of mass 20,000 kg. What is the tension in the lifting cable (1) when the submarine is submerged, and (2) when it is entirely out of the water?

参考答案:    

标记此题
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object weighs 7.84 N when it is in air and 6.86 N when20rlvdt;7k )o.dx n ih it is immersed in water. What is the specific gravivtrd)ldih .;2o k70 xnty of the object?

参考答案:    

标记此题
57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A container of water is placed on a scale, aw v*.3 j;cpf-mb6sr0bw faemfp,/,wc nd the scale reads 120 g. Now a 20-g piece of copper (specific gravity = 8.9) is suspended from a thread and lowered into.;ffp smfjpb3- ,mw0a/ c*wcwevrb,6 the water, not touching
the bottom of the container. What will the scale now read?

参考答案:    

标记此题
58#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of aluminum with a mass of 1.0 kg and gbdlsq 4l)df3s2;q h5svs8+0e rwvy;density of $2700 \; kg/m^{3}$ is suspended from a string and then completely immersed in a container of water. The density of water is $1000 \; kg/m^{3}$.
(a) Determine the volume of the piece of aluminum    $\times 10^{-4} \; m^3$ (fill in numerical value only)
(b) Determine the tension in the string after the metal is immersed in the container of water $N$ (fill in numerical value only)

参考答案:    

标记此题
59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cylindrical rod of length 12udr+r b:5lj. jzajv51e+ ikt5 cm and diameter 2.0 cm will just barely float in water. r5lkt1+ bjzv: .rua5+jid5je What is its mass?

参考答案:    

标记此题
60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A rectangular box of negligible ma i (z*k* t-pv b/r0u9np7hhimhss measures 5.0 m long, 1.0 m wide, and 0.50 m hig(vhi t*buh 7k-/nrziph9 m0 *ph. How many kilograms of mass can be loaded onto the box before it sinks in a lake?

参考答案:    

标记此题
61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $1.0 m^{3}$ object floats in water with 20% of it above the waterline. What does the object weigh out of the water?

参考答案:    

标记此题
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object floats with half its volume beneath the surdfykgrw ne*pau7 l -,hk5f+vf78d *q( face of the water. The weight of the displaced water is 2000(f*aqky*5, -du8 whfle+vfkn7dp r g7 N. What is the weight of the object?

参考答案:    

标记此题
63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A solid object floats in water with three-fourths of its volugxh g45h0jbf1y5i,i x6u ;wvame beneath the surface.ix;fuw15 hib4yg 06 vxh, ajg5 What is the object's density?

参考答案:    

标记此题
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 200-N object floats with three-fourths of its volume benr qi0c1m qr::aeath the surface of the water. What is the buoyant forc: q camr0:qri1e on the object?

参考答案:    

标记此题
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A polar bear of mass 200 kg stands on an ice floe 100 cm thick. What is the d c:p8+wa3sll8 dlc 6lminimum area of the floe that will just support the bear in saltwatew6l+ pld8: s3clald8cr of specific gravity 1.03? The specific gravity of ice is 0.98.

参考答案:    

标记此题
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Liquid flows through a 7gw xoxcqbgp(/4cyl -h. ny5l,9by2apipe of diameter 3.0 cm at 2.0 m/s. Find the flow rate.

参考答案:    

标记此题
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Liquid flows through a 4.0 cm diameter pipe at 1.0 m/s. There is a 2.0 cm diame+ ikndds:m7; jter restriction in thidn 7 m;+d:jske line. What is the velocity in this restriction?

参考答案:    

标记此题
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows at 12 m/s in a horizontwtv-ipw q)v * s97re-nal pipe with a pressure of $3.0 \times 10^4 \; N/m^2$. If the pipe widens to twice its original radius, what is the pressure in the wider section?

参考答案:    

标记此题
69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much pressure does it take for a pump to supply a drinking fountahl t;e-2 g*poc9ncqj;in with 300 kPa, if the fountain is 30.0 m aboh q-lcn;tcj*9o p e2;gve the pump?

参考答案:    

标记此题
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A hole of radius 1.0 mm occurs in the bottom of a water storage tank tha /ammf6f,4ios1et 9l wt holds water at amfitm4l6,/ s f 9wea1o depth of 15 m. At what rate will water flow out of the hole?

参考答案:    

标记此题
71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a horizontal pipe of cf(h 9rt65m pkeross-sectional area $10.0 \; cm^{2}$ at a pressure of 0.250 atm. The flow rate is $1.00 \times 10^{-3} \; m^{3}/s$. At a valve, the effective cross-sectional area of the pipe is reduced to $5.00 \; cm^{2}$. What is the pressure at the valve?

参考答案:    

标记此题
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  SAE No. 10 oil has a viscosity of 0.20 Pa-s. How long would it take to pour tp zx(hg9hez )1ok bw,kq0043axoyk, 4.0 L of oil through a funnel with a neck 15 cm long and 2.0 cm in diameter? Assug pk zh)bq ,(yota,3zewkx9x04ho10 k me the surface of the oil is kept 6 cm above the top of the neck, and neglect any drag effects due to the upper part of the funnel.

参考答案:    

标记此题
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that the build-up of fatty tissue on the wall of an artery decreasebfy3- i z.g 8az .hd0+kkmise:: pl-pkd the radius by 1h-skz -+kf i3: b zgme80ikp..ap ldy:0%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow?

参考答案:    

标记此题
74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two narrow tubes are placed in a pan of water. Tube A has twice the diame0z 0rpujlm1j7ter of tube B. If water rises 24 cm in tube A, how high will it rise0j 17j zmr0pul in tube B?

参考答案:    

标记此题
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The surface tension of water is 0.073 N/m. How high will ipigx29t9xh zo.5ee 0hxf;;bwater rise in a capillary toepg x0 ;fhe5ibxh i2;z .9t9xube of diameter 1.2 mm?

参考答案:    

标记此题
76#
 
  232

参考答案:    

标记此题
77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  To what height would water at 0 degree Celsius rise in a+euas 9pgqok/a. 2k2mv x:f 0w glass capillary tube with a diameterv: 92p2mguaew+0so.ax/f k kq of
0.50 mm?

参考答案:    

标记此题
78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A narrow tube is placed vertically in a pan of water, and the water r k )ske 3kcd5s.qbb/*eises in the tube to 4.0 cm above the level of the pan. The surface tension in the liquid is lowered to one-half its original value by th kbe)ks5.b 3ce/ ks*qde addition of some soap. What happens to the height of the liquid column in the tube?

参考答案:    

标记此题
79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a rectangular frame of length 0.120 m and width 0.600 m with a soap gi rz c;4)ykg9film formed within its confined area. If the surface tension of soapy water is 0.0260 Nik gyg4 z;c9r)/m, how much force does the soap film exert on the 0.600 m side?

参考答案:    

标记此题
80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An adjustable rectangular frame has length 12 cm and width 5 cm, aton1rqp*+: v rqjjq 6 .,upcs)nd is built in such a way that one of the longer sides can be moved without bursting the soap film contained in theo)1 rjr:ucs *nqtv6j+qq ,pp. frame. Soapy water has surface tension 0.026 N/m. How much work is required to move the adjustable long side so that the frame is 12 cm square?

参考答案:    

  • :
  • 总分:80分 及格:48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 80 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|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2024-12-5 03:09 , Processed in 0.457972 second(s), 181 queries , Redis On.