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习题练习:Physics Unit14: Heat



 作者: admin发布日期: 2022-08-08 11:28   总分: 79分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月08日 11:28  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is the smallest mcyl:sody h;d;9 5ew7zt 8 i3cunit of heat energy?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The amount of heat necessary to raise the temperature of 1 g9cj g)uvj0r b //0sqsf92kfg pram of water by $1 \; ^{\circ}C$ is referred to as the

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The measure of the average ;ba vf t30su;okinetic energy of individual molecules is referred to asufvba3;0;s ot

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cup of water is scooped up from a swi d5kd1f,qp*(rjyj j (8dr 4ldkmming pool of water. Compare the temperature T and kj8(,ddjf45rrjp(y dk*1q ld the internal energy U of the water, in both the cup and the swimming pool.

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The internal energy of an ideal gas depends o2 w:nuwuji5)-t,veh , t2an.rr i9sfxn

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal gas at STP is first c .trnw fkwh,3e bk-l4i 9o.d-qompressed until its volume is half the initial volume, and then it is allowed to expand until its pressure is half the initial pressure. All of this is done while holding the temperature constant. If3w-kblwh nqtfe.d, k i-9r4o. the initial internal energy of the gas is U, the final internal energy of the gas will be

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal gas with internal energy U at ty*pp3tlq.yjgr 47kt +t d7:k$200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The reason ocean tempeiip+)kjyqe u8 c2z h1ur wn8.4ratures do not vary drastically is that

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It is a well-known fact that water has a higher specific heat capacitd7jt2nrf 2*c my than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amount of heat, 30 calories, is added to each. Which stam *j fr27tc2ndtement is true?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A thermally isolated system is made up of a hot piece of aluminum and a zy 6m;ygsms8f/ cwwa)*t3 so :cold piece of copper; the aluminum and the copper are in thermal contact. The specific hsw:yt8;*/ycms) g 6wfoasmz3eat capacity of aluminum is more than double that of copper. Which object experiences the greater magnitude gain or loss of heat during the time the system takes to reach thermal equilibrium?

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Phase changes occur

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The heat required to change a substance from the solid to the liquz* hjz7nn*ng 209wieo id state is referred to asng*9zw* o jnhizn7e0 2 the

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The heat required to change a substance from the liqume7 x0ae isu12q9x+j mid to the vapor state is referred to as thae xmq u1esmj x7+0i92e

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If heat is added to a pszjt;c m3r l3q22dw2x ure substance at a steady rate,

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a solid melts

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a liquid freezes;aq wvk:c y*h0

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a liquid evaporaw.9b1 n o*oadbtes

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a vapor condensjoaa:cp/4h2m 9fxez; es

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a cloud formation, water vapor condenses into water droplets whicues ,2 t(ridjui2ksw,qpde2.wbs. ( ;h get bigger i.sw,qs. k,pju2tw(dur2ide se; b ( 2and bigger until it rains. This will cause the temperature of the air in the clouds to

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Turning up the flame5y0 q8nk;iw0 /woym2ofp,yt- o wg8 g4mstx *j under a pan of boiling water causes

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Equal masses of wate f .6tziymo::l6*9tymmp/6 xfpjda,m r at $20 \; ^{\circ}C$ and $80 \; ^{\circ}C$ are mixed. What is the final temperature of the mixture?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A chunk of ice ($T = -20 \; ^{\circ}C$) is added to a thermally insulated container of cold water ($T = 0 \; ^{\circ}C$). What happens in the container?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The process whereby heat flo 8r ow-n 2ampzhyzy e/r7vbn2m (47qc(ws by means of molecular collisions is referred to as mae7rw(vnyq4 y2/bnhzmpc(28r 7 -zo

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  By what primary heat transfer mech rom4z) l6b(2(ktxzwkqdbs ;-anism does one end of an iron bar become hot when the other end is plk (;4 2) zk-bm(zbqsoltrx6wd aced in a flame?

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  On a cold day, a piece of metal fz:p g9 gh*oy+leels much colder to the touch than a piece of wood. This is due to the difference in whicpy :log z*hg+9h one of the following physical property?

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you double the thickness of a wall built from a homogeneous material, the ra5mj1d360s pn(gn 8 jp6yeqe ax6a sdd*te of heat loss for a given temperature difference across the thickney a0q *6np5 3dd6(s n1jeexapjd8m6sgss will

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A layer of insulating material with ther r9d)xww f8 *d4lig 1qws(t0 zpgo;(jsmal conductivity K is placed on a layer of another material of thermal conductivity 2K. The lpr1wsgwf sd0io)g zl4d*q(x w9; jt(8ayers have equal thickness. What is the effective thermal conductivity of the composite sheet?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The process whereby heat flows by the mass movement of molecules fro4 t+,;xh++ knqlgxrj7y +y7:fjus s 3y*pyuf um one place to another is k xl ;+h,n :p rusx++y7jty*j4+uyufgqy3s7freferred to as

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  By what primary heat transfer mechanism is a po8d**o+g:i( gm/avtqesa96xc wv 7dw ot of water heated on a stove?

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Convection can occur;vjvjjez jh )m 76e+5, 4ofmsc

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following best expl jm.u 5q65t ;ovbi.i(zqu0sm/ m 3shl6:lllte ains why sweating is important to humans in maintaining sl l.:um q 3tj.6s;i(eo5sm lv quz/imt6bh0l5uitable body temperature?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A spaceship is drifting in an environment wnx;1hp6ci ,otccis.wt3,hg, here the acceleration of gravity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is true about the convection curren, wccg6 xh, .pn3tihst;1,ciots caused by this heating?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two neighboring rectangular houses bum/bg hg/*x+/oijnok 1ilt from the same materials. One of the houses has twice the length, width, and height of the other. Under identical climatic conditions, what would be true about the rate that heat would have to be supplied to maintainkimh /g /xj +obo/*1ng the same inside temperature on a cold day? Compared to the small house, the larger house would need heat supplied at

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the absolute temperature4q, v -3zcc q mxzjtkls/ad35; of a radiator is doubled, by what factor does the radiating power c5l;ccvsq mz/3zt-d kj3 xq ,4ahange?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The process whereby heat flows in the absence of any medium is referr(zx2dgmthb02j8y)a1 we 0fw8xrh fi 8ed to as

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  By what primary heat transfer mechanism does the Sun 8n*im t3 8wur*tb )jy+z hlz9uwarm the Earth?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  1700 J of work is equivalent to ho-+ p flzsejlw7h0.ge v2kedp1e41o .r w much heat?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.5 kcal of heat is equivalent to how -7d t-k l 8ke34r rvs.yzvnx8rmuch work?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Gasoline yields $4.8 \times 10^{7} \; joules$ per kg when burned. The density of gasoline is approximately the same as that of water, and 1 gal = 3.8 L. How much energy does your car use on a trip of 100 mi if you get 25 mi per gallon?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat is needed to rais3h4iri/ p alg.v r6s2 m(uhbp)e the temperature of 100 g of lead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) by $15 \; ^{\circ}C$?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 40 kcal of heat is added to 2.0 kg of water, what is the resulting temperaturhgqa/ /yesx1 4eeh/ g asy4q/1x change?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-kg aluminum block s (x l,nhr*4h;kn ( b,uiw)f4v0tghuk is originally at $10 \; ^{\circ}C$. If 160 kJ of heat is added to the block, what is its final temperature?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  150 kcal of heat raise 1xr)f hk*i( y ):zycy:gthxe+s the temperature of 2.0 kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person tries to heat up lf n20l:de+yosl*z 8r her bath water by adding 5.0 L of water at $80 \; ^{\circ}C$ to 60 L of water at $30 \; ^{\circ}C$. What is the final temperature of the water?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A machine part consists g/doku( oy7tt3 ;;bfvs(tii, of 0.10 kg of iron and 0.16 kg of copper. How much heat is added to the gear if the temperatk;,/t;i7by(di oot( u vf3 gsture increases by $35 \; ^{\circ}C$?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  50 g of lead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) at $100 \; ^{\circ}C$ is put into 75 g of water at $0 \; ^{\circ}C$. What is the final temperature of the mixture?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 0.600-kg piece of metal gsy v1hlv;2h7n ddee,q1k+ v7 is heated to $100 \; ^{\circ}C$ and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at $17.3 \; ^{\circ}C$. The final equilibrium temperature of the mixture is $20.2 \; ^{\circ}C$, what is the specific heat of the metal?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 0.10-kg piece of copper, init 0uunt iay-8,0 q/ad )rzbia:wk)xa1fially at $95 \; ^{\circ}C$, is dropped into 0.20 kg of water contained in a 0.28-kg aluminum can; the water and aluminum are initially at $15 \; ^{\circ}C$. What is the final temperature of the system?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 50 g of material at j:i0 7or j gw(b6z.rfr$100 \; ^{\circ}C$ is mixed with 100 g of water at $0 \; ^{\circ}C$, the final temperature is $40 \; ^{\circ}C$. What is the specific heat of the material?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two equal mass objects make up a system that is thermally isolated from its fi1fub/ ).: 8fiwqo lpsurroundings. One obpf8/1:lob ).fiwi f quject has an initial temperature of $100 \; ^{\circ}C$ and the other has an initial temperature of $0 \; ^{\circ}C$. What is the equilibrium temperature of the system, assuming that no phase changes take place for either object? (The hot object has a specific heat capacity that is three times that of the cold object.)

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  On his honeymoon, James Joule attempted to explore the relationships between vx6uv:b *4wu-q g:i j7hvfxb9x arious forms of energy by measuring the rise of temperature of x jhfxxb q u9vi*:6bwuv4:g7-water which had fallen down a waterfall on Mount Blanc. What maximum temperature rise would one expect for a waterfall with a vertical drop of 20 m?

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The water flowing over Niagara Falls dropsr s)qp4kydxh- nd8:*zqy/s8v m8br6s a distance of 50 m. Assuming that all the gravitational energy is converted to thermal energy, by what temperature does the water riskr x/ 8nq:ds 6hz8vs)prqds ymy 8*b-4e?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 200-L electric water heater uses 2 vn*tdlug g v0q5)h tqm+8 s/vy/:p+rjkW. Assuming no heat loss, how long would it take to heat water in this ta d )u*0ql+psvngr+tv/h: tmv8j/g 5qynk from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5000-W heater is used to heat water. How long will it takeps0)oe-fqnp9-sb-hh to heat 20 kg of wateres 0-n-s9fh hopb)qp - from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An aluminum kettle (mass 10079 4ew)zn p5an6 gossr0 g, $c = 0.22 \; kcal/kg \cdot ^{\circ}C$) holds 400 g of pure water at $20 \; ^{\circ}C$. The kettle is placed on a 1000 W electric burner and heated to boiling. Assume that all the heat from the burner heats the kettle and its contents, and that a negligible amount of water evaporates before boiling begins. Calculate the amount of time required to bring the water to boil.

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In grinding a steel knife blade (specific hse 8(y.n vf l *ah*z 9e;;vtqb+snfnt3eat = $0.11 \; cal/g \cdot ^{\circ}C$), the metal can get as hot as $400 \; ^{\circ}C$. If the blade has a mass of 80 g, what is the minimum amount of water needed at $20 \; ^{\circ}C$ if the water is not to rise above the boiling point when the hot blade is quenched in it?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat must be removed from steam to change onv -r,e oe*( bj6,vgyit to liquid?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Ice has a latent heat of fusion of 80 kcal/kg. How much heat isw (dv*x -ly3s c) atwb1*q7zxs required to melt 200 g of ic*y *x13 (ltbcwzxq-w7das) vse?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat energy is needed to change 10 kg ofk)nhsm v.x *dadq ,qk 9;+oc6a c6k2og(5ream ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat needs to be removed from0jywwzp7y2q d) o9f s3 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The heat of fusion of ice is 80 kcal/kg. When 50 g of ice at z ehef9+no4am2 c fo7smxo- 8($0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Eight grams of water initial5cw68wsehcj*c::j; uy tq+ ,f:p n atwly at $100 \; ^{\circ}C$ are poured into a cavity in a very large block of ice initially at $0 \; ^{\circ}C$. How many g of ice melt before thermal equilibrium is attained?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A block of ice at $0 \; ^{\circ}C$ is added to a 150-g aluminum calorimeter cup that holds 200 g of water at $10 \; ^{\circ}C$. If all but 2.00 g of ice melt, what was the original mass of the block of ice?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If 2.0 kg of water ato .3adzem ;fhzk9qt 9 ej-8.ag $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat energy xozb,gy s4f 6whj:gh, 4s-cu3is needed to change 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat is required to change one gra -5ga ;hhu6gxqvdn 5/+8cil;yj rkg2 dm of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat is required to chan6go4 ocyiako6 .rjr 98qhji7 /)jon3gge 100 g of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person makes ice tea by adding ice to0(w4d qlighf, e6f1t8 kgs (di 1.8 kg of hot tea, initially at $80 \; ^{\circ}C$. How many kilograms of ice, initially at $0 \; ^{\circ}C$, are required to bring the mixture to $10 \; ^{\circ}C$?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The heat of fusion of lead is 5. n0a6eeteb l)29 kcal/kg, and the heat of vaporization is 207 k2ete6 lae0)bn cal/kg, and its melting point is $328 \; ^{\circ}C$. How much heat is required to melt 50 g of lead initially at $23 \; ^{\circ}C$? (The specific heat of lead is $0.031 \; kcal/kg \cdot ^{\circ}C$)

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The thermal conductivity of ccyenah e0 xk5.nh:s wd5 qpk)j56 ,kb(oncrete is $0.8 \; W/m \cdot ^{\circ}C$ and the thermal conductivity of wood is $1.1 \; W/m \cdot ^{\circ}C$. How thick would a solid concrete wall have to be in order to have the same rate of flow through it as an 8-cm thick wall made of solid wood? (Assume both walls have the same surface area.)

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The thermal conductivity of aluminum is twice that of brass. Two rods 4e:p0 kha*yt6vwacq-0;cfvd o k 37uq(one aluminum and the other brass) are joined together end to end in excellent thermal contuopc*q-e7afck 4tvya;6dk v3:qhw0 0 act. The rods are of equal lengths and radii. The free end of the brass rod is maintained at $0 \; ^{\circ}C$ and the aluminum's free end is heated to $200 \; ^{\circ}C$. If no heat escapes from the sides of the rods, what is the temperature at the interface between the two metals?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m.3y7etje,; wg wdjrv (1 If the outside temperature ijwwyv g(e;r dtj71 3,es $-10 \; ^{\circ}C$ and the inside temperature $20 \; ^{\circ}C$, what is the rate of heat conduction through the window?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. If the outo 0kx9vqh-mm9sdp8 0 oside temperatumd ok 0x-9sp9mvh8 0oqre is $-10 \; ^{\circ}C$ and the inside temperature is $20 \; ^{\circ}C$, how much heat flows through the window in one hour by conduction only?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much heat will flownwsu0 0:t 3cr*-hcelq5dwci , in 1.0 hour through a 2.0 m x 2.0 m section of concrete ul:t-d s3chw 5qw,nec0i*c0 r($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 10 cm thick if the inside temperature is $21 \; ^{\circ}C$ and the outside temperature is $4 \; ^{\circ}C$?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long will it take to transfer 1,000,000 cal of heat throu h(e.awcnj igb.fhi285h3 xm u 8u ((3k)pujqegh a $2.0 \; m^{2}$ pane of 0.30 cm thick glass ($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) if the temperature differential is $10 \; ^{\circ}C$?

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76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the outside temperature if 4000 kcal of heat is lost thk r6y25 165azdhze: jqagcx/yqjhp f 7h1,gn*rough a $4.0 \; m^{2}$ pane of 0.30 cm thick glass ($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) in one hour from a house kept at $20 \; ^{\circ}C$?

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77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In an electric furnace used for refining steel, the temp4sqtb2kcni ye:p7 )):p6 fnenerature is monitored by measuring the radiant power emitted through a small hole of area )2f p e):y:nn4pbik esc t76nq$0.5 \; cm^{2}$. The furnace acts like a blackbody radiator. If it is to be maintained at a temperature of $1650 \; ^{\circ}C$, at what level should the power radiated through the hole be maintained?

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78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what rate is the human body radiating energ6 j4vbxo nep) p3p5-wsy when it is at $33 \; ^{\circ}C$? Take the body surface area to be $1.4 \; m^{2}$, and approximate the body as a blackbody.

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79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What temperature exists inside a solar colle 5 scd7ex 4b4bst5,el6qs,ckuctor (effective collection area of $15 \; m^{2}$) on a bright sunny day when the outside temperature is $+20 \; ^{\circ}C$? Assume that the collector is thermally insulated, that the Sun radiates the collector with a power per unit area of $600 \; W/m^{2}$, and that the collector acts as a perfect blackbody.

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