Which of the following is thkvhc-.xd zd1 /e smallest unit of heat energy?

  The amount of heat necessary to raise t;ccq vdf ;fu,p0f;h 3khe temperature of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic energy of individual molecules sld6b7wtdg9*d- bwd 4 is referred to a4sl-bw w9 dbd67dgd*ts

  A cup of water is scooped up from a swimming pool of water. C;or h3th+cs o.4zqr)fompare the temperature T and the internal energy U of the water, in both the co+t) fro.zh43hsc q ;rup and the swimming pool.

  The internal energy of an ideakxr)k mjsnz1e9t 4 ,f4l gas depends on

  An ideal gas at STP is first compressed uls4uzdp;7 4z f 2z;d:wqa- nnbntil its volume is half the initial volume, and then it is allowedfp:z4bs nz2w4l;znd;- udqa7 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

  An ideal gas with internal eneqtb j zntuy-9s *vg65;rgy U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drastically i 93 nwceq9m*p)oc l2sus that

  It is a well-known fact that water has a higher spk7va(-f:k: q lhra/ iwecific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amount of heat, 30 ca rh /lvwfa-a:i(:k7kqlories, is added to each. Which statement is true?

  A thermally isolated system is made up of a hot piece of alum z0x9;f:u2drml 8mje:q sal7qinum and a cold piece of copper; the aluminum and the copper are in thermal contact. The specific heat capacity of aluminum is more than double that of copper. Which ld0:x7ja;lmruqfzs :m 8 q9e2 object experiences the greater magnitude gain or loss of heat during the time the system takes to reach thermal equilibrium?

  Phase changes occur

  The heat required to change a substance from zx;k gx)tl.+j the solid to the liquid state is referred to as the ljkt)xx;+.z g

  The heat required to change a substance from the liquid to the vig s3h7a8 v*mizk8kwyaf 9kd42mx;b 3apor state is referred to as h;s238dk wkv z9km37b *iiamy a4gf8xthe

  If heat is added to a pure substa.a+ -frs4vqtbnce at a steady rate,

  When a solid melts

  When a liquid freezeoe 0qlgkt-j ab(10v)gs

  When a liquid evaporates197j lfximhjnlv9 4;xa4 w n7t

  When a vapor condenses.m p7 sajzs,4.o-x frl

  In a cloud formation, water vapor condenses into water dropleb i*l;y bpc; x*r5f4ml ndev,*ts which get bigger and bigger until it rains. This will cam**xdlnr5i v eyc ,;lf;pb*b4use the temperature of the air in the clouds to

  Turning up the flame under a pan of boiling wati mx qed/hnt8md31y93y3b jg*er causes

  Equal masses of water at dt *h0biu7i 6k$20 \; ^{\circ}C$ and $80 \; ^{\circ}C$ are mixed. What is the final temperature of the mixture?

  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?

  The process whereby heat :tw2re mgi 09hpqf954 x 2sjoxflows by means of molecular collisions is referred to ast m0jx:x 5pisehwfq ro2g9 942

  By what primary heat transfer mechanism does one end of an iron bar become wx-6vc *8;ipm bsmv3qt* c 7qbhot when the othercq7i8b vx ;-sm*c6qp3v*t mwb end is placed in a flame?

  On a cold day, a piece of metal feels much colder to the touch than a piece2rf0z sxedg,wa f-t4+ of wood. ,f0s adwr-2txf+z4eg This is due to the difference in which one of the following physical property?

  If you double the thickness of a wall built from a homogeneous material, the r brzg54o.cu7 om 0sn25uvp,hnate of heat loss for a given temperature difference across the thinz 2 vpbsr5 7c o40h5un,u.mogckness will

  A layer of insulating material with v0x-43guhuz6lfyf(l3kr hg5thermal 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 of the comp4lr3 g65v hg-3l(uzxff k0y huosite sheet?

  The process whereby heat flows by the mass movement.b /6dydzrp4ll-k ch; ecy)l: of molecules from one place to another is red/kyz d cl-r64:le)c hblyp.;ferred to as

  By what primary heat transfer mechan9 1rhstjkg:f m4dm88h ism is a pot of water heated on a stove?

  Convection can occur 56yu cjmsbzu/b8 h1n4

  Which of the following best explains wu* yc9zy,dbf h: tsn0*hy sweating is important to humans in maintai h:*yzfcnusd* b9t0y, ning suitable body temperature?

  A spaceship is drifting in ahy a.uj 2.z6lzn environment where the acceleration of gravity is essentially zero. As the air on one side ouhaz zl..6 yj2f the cabin is heated by an electric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring rectangular hx ka+yl:5vpwmovhno85 /1 r7w ouses built 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 maintain the same inside temperature on a cold day? Compared to the small mvn75+yxvk1 w 5a/8 hplo:rowhouse, the larger house would need heat supplied at

  If the absolute temperature ofj)41d qey(z1wnklm84h73m a; f ijhe d a radiator is doubled, by what factor does the radia4)qk 4(yimn7f mzh 3 jeh1dl8eajw1; dting power change?

  The process whereby heat flows x5ugd3003 rfl b a bcwsxrvq +lo.;p1fh05,dtin the absence of any medium is referred to as

  By what primary heat transfer mechanism does the Sun /)chwd.8v uczp xc.l eiq(+w*warm the Earth?

  1700 J of work is equivalent tm/rt+kt)u*s oo how much heat?

  16.5 kcal of heat is equivalent to how vpu d1y ../vdmmuch work?

  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?

  How much heat is needed to jlg o.t5af 8fyu9z:a/ raise the temperature of 100 g of lead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) by $15 \; ^{\circ}C$?

  If 40 kcal of heat is added to 2.0 kg of water, what is t)y kjo /+kse6whe resulting temperaturje+6 ks /ko)wye change?

  A 4.0-kg aluminum blockd- bng:a 3qk 1/ek6usu is originally at $10 \; ^{\circ}C$. If 160 kJ of heat is added to the block, what is its final temperature?

  150 kcal of heat raises the temperature of 2.0 kg of mater 0wyc)ooejxr, f8w9 pt. 1gav+ial by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath water by adding 5.0 L of waa u we.iaxfwx)p.71+7u ms7izter at $80 \; ^{\circ}C$ to 60 L of water at $30 \; ^{\circ}C$. What is the final temperature of the water?

  A machine part consists of 0.10 kg of ire3 *i6u sqqi fgml/0a-san8w9on and 0.16 kg of copper. How much heat is added to the gear if t s38-ew90g/fqm u *anq ai6ilshe temperature increases by $35 \; ^{\circ}C$?

  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?

  A 0.600-kg piece of meyv lw:*7s d0tbx62hzi tal 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?

  A 0.10-kg piece of copper, initially6 xz+y3kxehfr*- 3:vu bblslcucqd ;ha a79+) 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?

  If 50 g of material u(x,w;f) in)at ezov(at $100 \; ^{\circ}C$ 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?

  Two equal mass objects make up a systeh .f;ezo4v zz (+yoka+m that is thermally isolated from its surroundings. One objoh zk;.ezof4y(+v+z aect 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.)

  On his honeymoon, James Joule attempted to explore the relationships /a/ tlbu k6ymdx.j3s3between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc. What maximum temperature rise would one expect for a waterfall.m6a3 // ybkustjx3ld with a vertical drop of 20 m?

  The water flowing over Niagara F:bfz y8f+.of nalls drops a distance of 50 m. Assuming that all the gravitatfb yn+fzof 8.:ional energy is converted to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming no4d5(l4 fk3s;q rlf3 gadvj (vr heat loss, how long would it take to heat water v (fagdj l4 fsrrv3l5(q34;dk in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How long will it take pg9 q6( myn:t5hf1m*f oi,poa to heat 20 kg of wa69pp1hof g:ni tm*y5( qfa,moter from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass6+b bnrju1nid5 vzgu57b b se(z 2u-h+ 1000 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.

  In grinding a steel knife blade (specifm sr/9fh-e(sche9c q.ic heat = $0.11 \; cal/g \cdot ^{\circ}C$), 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?

  How much heat must be removed from steam g5 3w5of:-6c0fcve g8er/v1pvrbx z pto change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. How much heat is required to mel-fxta ,) apf9ea4: cy-uywi2- :ilzpr t 200 g of icrza-x9fitape:2pawyu-,c if: - 4 )yl e?

  How much heat energy is needed to change 10 +hg 2v5axov .2yjhof 7kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to beewg z)uz2-k 48m/kbeih13i fr removed from 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg.gv0sz8cf4 rf9u5m3czk t;s(c When 50 g of ice at $0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?

  Eight grams of water initially 6307r;fgpik,hw to kdajb-1 jat $100 \; ^{\circ}C$ 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?

  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?

  If 2.0 kg of water at19.;m m.wtbs lo g3gef $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 kg+svf.s:qq,7cz/ww7pn0 rdmfuo6h.h of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to change one gr3 htzlr;*h q2mam of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is requirep.x1. z1cr0noexx 2z ld to change 100 g of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding ice to 1.8 kg of hot tesltml;h15hd 6 a, initially at $80 \; ^{\circ}C$. How many kilograms of ice, initially at $0 \; ^{\circ}C$, are required to bring the mixture to $10 \; ^{\circ}C$?

  The heat of fusion of lea *6yk0y)ab4v .ztlxh vd is 5.9 kcal/kg, and the heat of vaporization is 207 kcal/kg, and its mel ylvy6*4)h.tz0x avkbting 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 $0.031 \; kcal/kg \cdot ^{\circ}C$)

  The thermal conductivity nc.0z-axfak m xp(o15of concrete 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.)

  The thermal conductivity wbmvec vg2m4 njy+1s 8,n e;i-of aluminum is twice that of brass. Two rods (one aluminum and the other brass) are joined together end to end in excellent thermal contact. The rods are of equal lenj8,vy1evnm2b-;s4ewn mi +gc gths 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?

  A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. l/ zm xr: oyj+q5b)qw)If the outside temperature ijw r/:)lzqbqy5)o+mx s $-10 \; ^{\circ}C$ and the inside temperature $20 \; ^{\circ}C$, what is the rate of heat conduction through the window?

  A window glass 0.50-cc7; u rl1g*mbjqk e65lm thick has dimensions of 3.0 m by 1.5 m. If the outside templu7 j 6e1;5cr qlmbgk*erature 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?

  How much heat will flow in 1.0 hour through rsx94p-rd5skizv qn55n c,:yam*l: na 2.0 m x 2.0 m section of concrete r 55m:y r5ad,np sink-z4:n vl 9sq*xc($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 10 cm thick if the inside temperature is $21 \; ^{\circ}C$ and the outside temperature is $4 \; ^{\circ}C$?

  How long will it take to transf+;n1)olnypps8bwa1 ver 1,000,000 cal of heat through 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 $10 \; ^{\circ}C$?

  What is the outside temperatura/ l1;gfxg uw:e if 4000 kcal of heat is lost through 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 $20 \; ^{\circ}C$?

  In an electric furnace used for refining steel(zlrf m)6 n9ol, the temperature is monitored by measuring the (l6 mrolfzn9 )radiant power emitted through a small hole of area $0.5 \; cm^{2}$. 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?

  At what rate is the hums9q:a6f72hue9ax1u zcy( n q-p7u xjjan body radiating energy 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.

  What temperature exists inside a sam;2flkrb, (q olar collector (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.