Which of the following is the smallest unit yino49 g,((/3 t2ee;qcofxrc37khtw c 7exo pof heat energy?

  The amount of heat necessari3r efuass1.27aj3om:b x 6 cry to raise the temperature of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic energy of individual moleculesy-t7 7y0jp lge is referred to j 0-77yeytpgl as

  A cup of water is scoopew)rx fjw/a8dioc6 bki-2 d85ed up from a swimming pool of water. Compare the temperature 5weja f8xdi2 )oc/ di8bwk6-r T and the internal energy U of the water, in both the cup and the swimming pool.

  The internal energy of an tt+mi:n8 uvicddoei6.(d90r ideal gas depends on

  An ideal gas at STP is first compressed until its volume is 8n r*,zi .sq9rmao3t lhalf 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. If the initial internal energy of the gaaom zr*r s9,38nq ilt.s is U, the final internal energy of the gas will be

  An ideal gas with internal en8j8ls*( kvgbfergy U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do nob nnbyu*u; cc/2kuv(/t vary drastically is that

  It is a well-known fact that water has a higher+k umnw g0d 7t2k-a7f63gwo, xrw bb3s specific heat capacity 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 statement is t x3twk72kubfdm03g w+wr-bs a6og,n 7rue?

  A thermally isolated3 lk s9iiqto3, system is made up of a hot piece of aluminum 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 object experiences the greater magnitti3,ksi l39qoude 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 the solid to thbt4n h 2 jw;2.d)uqxxrm7xw7qnmz 3v 6e liquid state is referred to a bwt7u2qrxhvmq)7w3.dn z ;x 4xm2jn6s the

  The heat required to change a substance from the liquid to th wcw9edfr0k43 f1/is pe vapor state is referred to asi3rdf0/1s ckwe 4pf9w the

  If heat is added to a pure substance at a steady 9rh/agq*cbsj;m 9) svh/wiv5 rate,

  When a solid melts

  When a liquid freezesyqh ;.;lc p6q8z+asm n

  When a liquid evaporh2 n4szv 4 dyo2f/znc;ates

  When a vapor condensesxz v2jrc .fi21

  In a cloud formation, waterfd8(b* bz6e*z yhox obglfr95 u7s, a, vapor condenses into water droplets which get bigger and bigger until it*a9 ds(g6yo7b*bfefzbo 5xzl u r,,8h rains. This will cause the temperature of the air in the clouds to

  Turning up the flame under a pan of k7/jgm9 l wyr+boiling water causes

  Equal masses of water 5xa- )xkpu v 3(d)r.c:oqnn aeat $20 \; ^{\circ}C$ 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 flows by means of molecular cp:j.s 7odmqautfb4dj( .14 ych+ )bavollisions is referred to ab.hqbdo+ yf74m :a )asd.pu j1c4tj(vs

  By what primary heat transfer mechanism does one end of an iron baruflbhod 1ewqhxm+ft) 8 p4)i/. jgh48 become hot when the other end i u1/)i4h4.+q mdthf8gwoj pbl8)hfe xs placed in a flame?

  On a cold day, a piece of metal feelsg;1y2rzn+k t s much colder to the touch than a piece of wood. This is due to the difference in which one of the following p z2y+ns1gk t;rhysical property?

  If you double the thickness of a wall built from a homogeneous mv6*cb,gv3c cwt8 xmf/aterial, the rate of heatc/fcvtxg,b 6w3 8* vmc loss for a given temperature difference across the thickness will

  A layer of insulating material with thermal conductivity K is placed x s)v)hcb35hdon a layer of another materia5 )sdvhxcb)h 3l of thermal conductivity 2K. The layers have equal thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat flows by the mass movement of molecules ftz7efa hy5+q57lw* ycrom one place to a+f5yaqzw y*t5c7 lh 7enother is referred to as

  By what primary heat transfer mechanism is a pot of water heated on a stovtmi wirh2fg.))--0 q w hy8txze?

  Convection can occurt (wh28lzu*s i

  Which of the following best xm8b28 dc-peo yx;x4 pexplains why sweating is important to humans in mainm;xxoxcp8 b- 8pyde24taining suitable body temperature?

  A spaceship is drifting in an environment where the acceleration of gravigeq5x-etsfz-6 nt q80o9is 3ity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is true about the convection cstt8-q o3engz-s95ii0 qxe6 f urrents caused by this heating?

  Consider two neighboring r1l j1, g:q3 huj sus4ngcmjls/dyd98: ectangular houses built from the same materials. One of the houses has twice the length, width, and height of the other. Under idyhj ,dc ss:1n u9lu sq8:d 3gj1g/jlm4entical 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 house, the larger house would need heat supplied at

  If the absolute temperature of a radiator is doubled, by what factor does tlvf r,wmot7 55he radia ov75rm5,wltfting power change?

  The process whereby heat flows in the absen8d:kxtev8+ lj ce of any medium is referred to as

  By what primary heat transfer mechanism does the Sun wn a:w i8af0 exe,tpm.im.tr e2w6; ft6)yq 6hvarm the Earth?

  1700 J of work is equivalent to c 7gy)c-gndp -how much heat?

  16.5 kcal of heat is equivalent tg x+5nfg(a2kfykhdd2y 4 2nj;o how much 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 raise the temperature of 1 s ita0bd i9njhx5*.))mazzjn-s6 fg;00 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 rg;e z6he8 m-vqk*d og:x;q d1kg of water, what is the resulting temperature qkxmr * h;1z6 qeg;o8d- :edvgchange?

  A 4.0-kg aluminum block p5u7p k v-ir2bis 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 temperatuwc)0se9 z18nfnd +mw:vdhkl; re of 2.0 kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath water by a,2;bwz s,+b q/xby xyzdding 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?

  A machine part consists of 0.wnyi)qfbd1 migi. bs6:o*01j 10 kg of iron and 0.16 kg of copper. How much heat is added to the gear if the tempe1 *dmnf0 syobqi)6 w.:b1 jigirature 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 metal is heated )(grw u-m q3xkto $100 \; ^{\circ}C$ 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 coppd z5 3te,5bnklpvuv8/a v90yzer, initially 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 a vy/e,o2))ogqx6x,-- psb l0ezvvc: wy ;if snt $100 \; ^{\circ}C$ 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 system that is thermally isolated from ihx+b 6*,y .6:vzpsixpy vv kn)ts surroundings. One object 6pynxzy v:+6h,v*xvbi )s.kp 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 re7v o/pexw;xsf *b*kz+lationships between 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 with a vertical drop ofo*vzeb;/ f* w+xsp7 xk 20 m?

  The water flowing over Niagara Fa nd9ud-he5z jk, x565x: fqkuqlls drops a distance of 50 m. Assuming that all the gravitational energy is converted to thermal energy, by what temperature does theh ,56djduf :zqxq e9xu n55k-k water rise?

  A 200-L electric water heater uses 2 kW. Assumip 9slv ns8o-v(ng no heat loss, how long would it take p(o s 8vn9svl-to heat water in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is us)mhpy i sgcw8i65b/ja q)4u fkzgu)7)ed to heat water. How long will it take to heat 20 kg of water fm8fsukw)iy4)p)ca/ gjh i ugq 5z 6b7)rom $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass *d ok;ro7ly3o1000 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 (specific heat = .vddg(ar);eop . 0,w su+tojn $0.11 \; cal/g \cdot ^{\circ}C$), 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 removedyb(m r5n zqm, (im4uoi.wy t// from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. /koa8s g ww2r a( 0fnr*7hzl -1oz/zsxHow much heat is required to melt 200 g of ice? rh/(xwzn 0rz-kw7sg*8 lo2safz /a1o

  How much heat energy is needed to cha- m8(s hwvf0dunge 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 10tnx rgsgbu2wa97.)i) a r,l;y 0 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg. When 50 g of b3/i ;opx/fsrice at $0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?

  Eight grams of water initi.bjk gp2-8otp 2 jh,ytally 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?

  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 atwlc7v*d-js3 t c:xle. $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to chan (:2p9lyjupg oge 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to chan2 lza+q+)9sox- *z/ek djquxige one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required gs*:39gus-7iob bv dwto 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 tea, inivs4 pcw1xgr9 (tially 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 lead is 5.9 kcal/kg, and the heat of vaporizatiupjd4ks4 ,9 bpon is 207 kcal/kg, 4 p9skdpu,j 4band 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 $0.031 \; kcal/kg \cdot ^{\circ}C$)

  The thermal conductivity of concrete is r j afr;vd8ws;q7qz,z-1 it( l$0.8 \; W/m \cdot ^{\circ}C$ 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 of aluminum is twice that of brass. Two rods (one r,s8ok h 83m/ /eic idt)5j*qou l(vwoaluminum 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 u, etimocoihj(3// qdw8l 58ksv) *roat $0 \; ^{\circ}C$ 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,uj .iy x 3 djr0*yukkj65o/kj thick has dimensions of 3.0 m by 1.5 m. If the outside temperatu d*j3,j/0u. oiyrkyj ju6k5xk re is $-10 \; ^{\circ}C$ and the inside temperature $20 \; ^{\circ}C$, what is the rate of heat conduction through the window?

  A window glass 0.50-cm thick has dyzp 0 pi5+acyf0cnnj7b ,h/ l7imensions of 3.0 m by 1.5 m. If the outside temperaz,pyn pyf chc07 j05+i/nl ba7ture 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 throug(nnt ob7y8/ jrh a 2.0 m x 2.0 m section of concrete (b(j 7toy /nr8n$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 transfer 1,000,000 cal of heat gts o8 s z8eg-10x-rapthrough 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 temperature if 4000 kcal of heat .gq j)le/qm2dis 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 refinin8u8c3,iivu muh 2qp5ag steel, the temperature is monitored by measuring theva 8q8u hcpum3 ii2u,5 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 human body radiating e;sz* z25mycwnb m k1l1nergy 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 solar coh0l7t9s 5dc tik,,jeullector (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.