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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 unit of heat ene+*r3ozz:*;n2sqv ruhtp *+si b -znvorgy?

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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 n68)t z wxbolpfl8 xt5/ecessary to raise the temperature of 1 gram of water by 1C 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 kiimo1(wc w 8ue3netic energy of individual molecules is referred to a1oe8 wiw(cm3us

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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 swimd2uc h 5tv368zl2ar9cryixe 9ming pool of water. Compare the temperature T and the internal energy U of the water, in both the cup and the swic uhdzv 9lrre y39caxt86252imming 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 depehq) 322z.+seway us pa(eu9d ands on

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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 compressed until its volume is hu4 hqfi ;c,xk8alf the initial volume, and ,qiu;xh4f k 8cthen it is allowed to expand until its pressure is half the initial pressure. All of this is done while holding the temperature constant. If 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 r j gounh76f)0at 200C is heated to 400C. 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 temperatures do not vary drasticar *.ongiag3sdz(ze q/0 ma.q;lly 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 capacw( usx 2r54fxftfb b; 2yz/z2bity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amy s/zzrxx w;bt42fff(2b5b2u ount of heat, 30 calories, is added to each. Which statement 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 qgib17kd3 (3pvw.dfw made up of a hot piece of aluminum and a cold piece of copper; the aluminum and tpfb17iv3(d 3 w.qwkgdhe copper are in thermal contact. The specific heat 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 thk *f n.ny53jnl i2pc:5m-nuuda 4sr)o the liquid state is rel hs-.3)u 2 5n ncakyu:pifm5rnd j4n*ferred to as 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 snws ty. a i tag;3kb.nt641y1wubstance from the liquid to the vapor state is referred tst w6; 1.taigat yk.nb 41wyn3o as the

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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 pure substance at a steady r-1ox-iyvlm4/be4yui5uk * bpate,

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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 freezef6u))t6psbcvyg3( )avgbk l w .o x5igzw+5e* s

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a liquid evaporza 6jrv+6s2ss ates

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a vapor condenses3(rn e :t+xevq

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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 dropletst )owi5/ v1.edt:gl w-9tjir5h2 9db+veqsao which get bigger and bigger until it rains. Thissbwdth5to/a g 19+vio2rdiwq. :5vtjee l 9- ) 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 flame under a pan of boiling w *b-po1bt ev zz(pkwkq/ p2 zq)*z5+jjater 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 water at 9nxnjse:h)xwpg ct/ g8 )-) vd20C and 80C 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=20C) is added to a thermally insulated container of cold water (T=0C). 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 fa)i5 6mk 9icmow6h;bglows by means of molecular collisions is referred to as i;g)hm9 i6ckm 6boa5w

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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 mechanism does one end of an iron bar become hot d qukt *k8)yt9,yhm/v76k.6hbvpd yi wv8 .kq/t vy,mbk69)* kt hid76 dupyhyhen the other end is placed 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 feels much cvli nyu0e vy.okjx9)e, f;27m older to the touch than a piece of wood. This is duo f90;l7x,2. e )eui jyvnmyvke to the difference in which 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 thicc*;ctiu4n hjcr5:l -12jw hc7 bken2/f xt2aukness of a wall built from a homogeneous material, the rate of heat loss for a given tl:uuncjcn tfk-2hw*/22bcchajr e 4i7t 5 ;x1 emperature difference across the thickness 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 thermaly(zkthdx/8nd:-r 3s uooj9 *tjoi++j conductivity K is placed on a layer of another material of thermal conductivity 2K. The layers have equal thickness. What is the effective thermal conductivity ozot(o h8 ynrxjd-u+:j3ojt/ * ks+di9f 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 kjr3wp ixys8 -,rs:)n :b3npm 1nqb 1kmass movement of molecules from one place to another is referred to :3jprbm1q3ny8bk :)x ,sni w-kr snp1as

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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 j+-*. fe4jote*uxvoo pot 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 occurtxl93 g iw*z)zb ii;.o1h-ro rmz m8c+

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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 explains why sweatt8 )gop4qr i)ting is important to humans in maintaining 8)t4tgq irop)suitable 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 any a-we86de -; y sn1js9.smavs environment where 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 currents caused by this heati;nass-d y wssm -1a 6evj8.e9yng?

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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 built from the same materials. 4bhgh,0b /obj One of the houses has twice the length, width, and height of the other. Under identical climatic conditg hbb4, obj/0hions, what would be true about the rate that heat would have to be supplied to maintain 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 temperature of a radiator is doubled, by whathnpb,/;-m1axi sp *z ov2 1och factor does the radiating power chp;zv,ahh bc11*/io s o2mnx-pange?

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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 re z q(6zl7hux)phqe3.eferred 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 memux brjkm2p2 d23bt638 rj,, mzzont(;rw bd7chanism does the Sun warm 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 how much heanfkt hz.+1bo56dx -krt?

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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 much7bbt4 y py( eka-4lujon3o3z j +1set2 work?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Gasoline yields 4.8×107joules 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 rai + n3bgn*rav)4k-fsik se the temperature of 100 g of lead (c=0.11kcal/kgC) by 15C?

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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 temperatur3+lwog-mqh6 l f0d5 uwi98j qbe cha-f 9j+dih8wwm 3 u gqlq0lo5b6nge?

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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 is originallairj 54u0xk+xi+ 6 xoky at 10C. 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 raises the temperature (6d vkf8o4htf8x a ht0of 2.0 kg of material by 400F. 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 hea;e*pq0. rk uint up her bath water by adding 5.0 L of water at 80C to 60 L of water at 30C. 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 of 0.10 kx7* qqzob 2yu1 6p)jvoc+m*hf ;rlxg6g of iron and 0.16 kg of copper. How much heat is added to the gear if the temperature incoq;z*ru *oc6l2+ q6 )jybxf 7gphmx 1vreases by 35C?

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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=0.11kcal/kgC) at 100C is put into 75 g of water at 0C. 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 is heated th46fp6d0 gpylrzy 5+ko 100C and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3C. The final equilibrium temperature of the mixture is 20.2C, 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, ini5rko3+/g4irk rk8 hnftially at 95C, is dropped into 0.20 kg of water contained in a 0.28-kg aluminum can; the water and aluminum are initially at 15C. 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 ixhsi/+4:k)as+e db aat 100C is mixed with 100 g of water at 0C, the final temperature is 40C. 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 thermally2/ e- ;2agrjpqkedwo5 isolated from its surroundings. One object has an initial tek2;-gjaw ee52/qdrpo mperature of 100C and the other has an initial temperature of 0C. 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 explorenms:b,q/.p(cfh aai : the relationships between various forms of energy by measuring the rise of temperature of water which had falle:sai/q( p,fch:m a nb.n 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 dkx/w) 8n5uoforops a distance of 50 m. Assuming that all the gravitational energy is converted w x )koon8f/5uto thermal energy, by what temperature does the water rise?

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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 kmvife (lfo t4-n,,bbpim47 4sW. Assuming no heat loss, how long would it take to heat water in this tank fr4 l,bf4ei p,nm-i4omsv f7b( tom 23C to 75C?

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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 heatl3 t 2(xjv19xrpu ttty*2ap w3-3fpn b water. How long will it take to heat 20 kg of water fr pypw2xr(jpt-tfa9n blv utx13* 332tom 20C to 100C?

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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 1000 g,z0 a77 twc2p3d5 jpovc c=0.22kcal/kgC) holds 400 g of pure water at 20C. 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 (sc4k)mk9ca3 wlqp 0. bqpecific heat = 0.11cal/gC), the metal can get as hot as 400C. If the blade has a mass of 80 g, what is the minimum amount of water needed at 20C 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 it to l,:yrtg3 h vqh1o7x1wp iquid?

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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 is f+/d8g :gsi*.sfyrgurequired to melt+iu: gsg8r.f/fg*sdy 200 g of ice?

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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.mvye 9u ta(xyt;m*,p of ice at 20C to water at 50C?

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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 s)wweu akl+e5qo m at76t9+e4 from 100 g of 85C water to make 5C 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 ef2;0wih2 c*ejswvb -ice at 0C is added to 50 g of water at 25C, 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 initr b)e8 p3pfg ggmb7ctg.:iyjb) .wm(esh9**zially at 100C are poured into a cavity in a very large block of ice initially at 0C. 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 0C is added to a 150-g aluminum calorimeter cup that holds 200 g of water at 10C. 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 atv79k; n*r2cl iee78 c ecyyh*y 0C 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 is needed to change 10 ksmrw+bwlk p 51/;q.dtg of water at 50C to steam at 120C?

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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 on- scok;(sbwwlkrq4 1 o.dxw,)sm g :w1e gram of 0C ice to 120C 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 change 100 g orqrc(dq9i m2m 4swe2bzb 2-;wf 10C ice to 150C 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 add9o0 abyo 9b(dting ice to 1.8 kg of hot tea, initially at 80C. How many kilograms of ice, initially at 0C, are required to bring the mixture to 10C?

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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 5.9 kcal/kg, and the heat of vaporizationf7)bt 5nlb2a:icqikbf5q l*nhc7 ,a + is 207 kcal/kg, an:),af*bn5 b7 c ta c5ilh7kbfq2ni lq+d its melting point is 328C. How much heat is required to melt 50 g of lead initially at 23C? (The specific heat of lead is 0.031kcal/kgC)

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The thermal conductiv uk9nv)dx/1v qity of concrete is 0.8W/mC and the thermal conductivity of wood is 1.1W/mC. 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 bras m6zx)v2hxivt)2xerh:c+kh9 s. Two rods (one alumint2:x+v2xzv)ec kr6hh9)mx hium and the other brass) are joined together end to end in excellent thermal contact. The rods are of equal lengths and radii. The free end of the brass rod is maintained at 0C and the aluminum's free end is heated to 200C. 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 bp 7z fav5:.bou,-hazly 1.5 m. If the outside temperature is bv., laofauz5-hz p 7:10C and the inside temperature 20C, 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 dimenrfd7qmx4 n9 fh7gy6ll 0jc9x+ sions of 3.0 m by 1.5 m. If the outside temperature r 049m9ld7hqxj7 +yg ncfxl6 fis 10C and the inside temperature is 20C, 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 flow in 1.0 hour through a 2.0 m x 2.0 m section of concrete 2n)eh;a9(xfl ta1 v 8d:x pnvf(:1;dlxfa 9hpvf8x en) avn2t(k=2.0×104kcal/smC) 10 cm thick if the inside temperature is 21C and the outside temperature is 4C?

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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 tran rihz uq1s03-tkn c18rsfer 1,000,000 cal of heat through a 2.0m2 pane of 0.30 cm thick glass (k=2.0×104kcal/smC) if the temperature differential is 10C?

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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 m4rlg,p; i/upis lost through a 4.0m2 pane of 0.30 cm thick glass (k=2.0×104kcal/smC) in one hour from a house kept at 20C?

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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 tempz:utuw/hez,80p ;0)ajr tmju erature is monitored by measuring the radiant power emitted through a s;ej,pu hj0a)uz /t0tum z 8rw:mall hole of area 0.5cm2. The furnace acts like a blackbody radiator. If it is to be maintained at a temperature of 1650C, 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 ene)p n 31;qphousrgy when it is at 33C? Take the body surface area to be 1.4m2, 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 collector (effective collectio.ur kqvf96ac ruc*0o)x aj o09n area of 15m2) on a bright sunny day when the outside temperature is +20C? Assume that the collector is thermally insulated, that the Sun radiates the collector with a power per unit area of 600W/m2, and that the collector acts as a perfect blackbody.

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