Which of the following is the smallest unit of heat enera7d qak+lg 67n5a0dza gy?

  The amount of heat necessary to rh e4m xadp3c*k)tug9( aise the temperature of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic enel1n71jm o bw;orgy of individual molecules is referred to asl71mn owj;1ob

  A cup of water is scooped up from a swimming pool.z5i35qx 2xm 3qvns2vzx dc1w of water. Compare the temperature T and the internal energy U of the water, in both the cup an qi 2zxx3dvws nq15.53x2mzcv d the swimming pool.

  The internal energy of an ideal gasa. rjxqo 4s.ge( *4wxlupm. iy gm6)l :7frua2 depends on

  An ideal gas at STP is first compressed until its vtf.r 0e/js6k04csrr o olume 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. If the initial internal energy of the gas is U, the final internal 0t0 /rjrf.sr 46o esckenergy of the gas will be

  An ideal gas with internal energy U ac ) . 9n8dj4mpbbl c3fsp:zze7t $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drasticazq;2on)t f s+b( 8hbfxlly is that

  It is a well-known fact that water has atb0+5rj wd nw qb+a.j6br7 qn* higher 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 true6qj rtbrw+07ja qwn b5n *+.bd?

  A thermally isolated system jup d3qyo1afs/1:s*e 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 alumin/dje *ufy1: 31sqpao sum 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?

  Phase changes occur

  The heat required to change a subs630d-tu2f p2vab apxrtance from the solid to the liquid state is referre 26-adpxa0br uf t2vp3d to as the

  The heat required to change nbt,i+ln ln/9a substance from the liquid to the vapor state is referre tni/b ln,ln+9d to as the

  If heat is added to a pure substance at af,k5o0)mko a a steady rate,

  When a solid melts

  When a liquid freezev;yds-m 8 1 gjr.rm9sjs

  When a liquid evaporatnem6x)j va1uxs;/ie d) 4yi,aes

  When a vapor condense pp6 om-9 q)1r,ma 3gwo)bsu79nbcgxbs

  In a cloud formation, water vapor condenses into water droplets which get bigge4h a;kl2gj xv-m 3uj+hr and bigger until it rains. This will cause the temperature of the4kj 2hx+-amuglvj 3;h air in the clouds to

  Turning up the flame under a pan of b7ikcfnmhgyunl (q j,8g 5+ mwt56 )tg0oiling water causes

  Equal masses of water :hxbe.n64 nsje-ju (z1/ ix18glcbxr at $20 \; ^{\circ}C$ 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 collisions is refqubre + nl*gv9dg7(ppojuin:2g1q ) 3 erred to ai(+ :vq9u3rj dlueqbn *2 71gn)p ggops

  By what primary heat transfer mechanism does one end of an iron bar become h)zzb.lfgprnk z , ;5n *wdt17uot when the other end is pl l) f5ktz gn*7p u;wnz.1bz,rdaced in a flame?

  On a cold day, a piece of metal feels much colder to sev5tei1hc5(j e+wia z w*f6;the touch than a piece of wood. This is due to the difference in which one of thec setz6w;i1 5e hi5+(*awejf v following physical property?

  If you double the thickness of a wall built from a homogeneous materia34d apk/q*l-xy w mg+wl, the rate of heat loss fl/q*- x +mga43ywwpd kor a given temperature difference across the thickness will

  A layer of insulating material with thermal conductamrrwq x g8/ .1a-9drsivity 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 composite sh9.ma-s/r8r1r dgqx aweet?

  The process whereby heat flows by tm;7mn +d;stw ;se omf8he mass movement of molecules from one place to another is mm7; 8e;w+m dsontsf;referred to as

  By what primary heat transfer mechanism is a pot of water heated on a scaql20 0p fez0sj:qu oxz3w0(tove?

  Convection can occurh,ze v)epk, 5pm npqim:0l / wo7qt9.kq .y8oa

  Which of the following best explains wxro0 xmks 7ncq.66 on8u8mf d8hy sweating is important to humans in maintainin0s8mq6mdr8xu6fn. xo k 7n c8og suitable body temperature?

  A spaceship is drifting in an environment where the acceleration ofu rkljw+w pa93/h2td) gravity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is true about the convectionw u/)lp j3tkw9ha dr+2 currents caused by this heating?

  Consider two neighboring rectangular ho(zqin ;c;+sdruses 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 house, the larger house would need heat supplieds zdcr+i;(;q n at

  If the absolute temperature of a radiator is doubled, by what factor does the ra74 luni),27vmn4t rpzbkiw d9 diatin42t7 di)bz4nlruvki p79 w,mng power change?

  The process whereby heasv dmaw0f /1x6 ,5g.cvpgz q)rhtmx 3/t flows in the absence of any medium is referred to as

  By what primary heat transfer mechanism does the Sun warm the Earthg/o;rx3uyvq -; wyif/?

  1700 J of work is equivalent to how much heatfh/ah8 zc 4a8(o9zgxt?

  16.5 kcal of heat is equivalent to how much work?esvg9uulw s 9o zcc+h21 9d/x6

  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 temperaturc1j( l 45sfmrn;k q,kge 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 the rls *qi-tu8liz6iq c83i)i:i tesulting temperature-l)iz qqil6i8*ic38si : tui t change?

  A 4.0-kg aluminum block is originalljmoe(vxm fkb6c1d*v9u );y b; y at $10 \; ^{\circ}C$. If 160 kJ of heat is added to the block, what is its final temperature?

  150 kcal of heat raises9ad:1qdm1eqrm vmy 6oo/ b*4o 9sus:w the temperature of 2.0 kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up do9 pbay(c8d -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?

  A machine part consists of 0.10 kg q8/qj:h9yq+sxm3kbla ck 6 *m of iron and 0.16 kg of copper. How much heat is added to the gear if the temperhcqsjabk q:m69mq+ k8l x/*3 yature 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 he ,r2o/; r mjcp2vbtk:dated 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, izk7-j6zdsd j st6ao11nitially 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 at 3a a;hwk*q6 5im5y j 8bbhyz7h$100 \; ^{\circ}C$ 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 makea6 /mo g2muldj,8hcbmr k )7,z up a system that is thermally isolated from its surroundind ocg8mmr, a l6u2j),kbz/mh7gs. One object 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 Joul jwkkwx:5/;h cg4u(oe cna .t*e attempted to explore the relationships 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 riskwgu tk c.a*:w/ n 4hj5ec;ox(e would one expect for a waterfall with a vertical drop of 20 m?

  The water flowing over Niagara Falls drops a distakqd; *lxjft109oxi;r w b)u n5nce of 50 m. Assuming that all the gravitational energy is convertqtkl9*d wu01nro x b)if;x;j 5ed to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming no heat loss, how (i)0i vu y.jallong would it take touyl ji0v()i. a heat water in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How lont ids(chh2 05.dn fcr:g will it take to heat 20 kg of water from .0hdrdn 5 i:s2(ccht f$20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (massm*fv78bb x fm42,liyf 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 (specific heazytui p 3 q422u,h;fqjt = $0.11 \; cal/g \cdot ^{\circ}C$), 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 to change inw:acmnpoeq t4l xqbv)o89 z4:g 561vt to liquid?

  Ice has a latent heat of fag1umx0 +;upn2zhij*io)5 n r usion of 80 kcal/kg. How much heat is required to melt 200 g of iceu o;1) ixanr2+u5miznh 0g *pj?

  How much heat energy is needed to cn+4thmyj,kh3 t *dv0* hms+lwhange 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 100 g ofm uh 29;fj:tdy $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg. When 50 g of ice at uy j,;1o;6cl epkshf9 gf.xb0: ob:oy$0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?

  Eight grams of water initiallyj9ds mx x;b0 vmc-8-fy 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 at n z8pp mwub.z6f j 6s0)cg9oi*$0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 kg b;a y4bz: gel./d9l deof water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is reqjg dpbpy/ 93v3uired to change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required to cha8qotkptjw ki;q//9 3 hnge 100 g of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding i)ioehh mj,x9tm9 az95ce to 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 $10 \; ^{\circ}C$?

  The heat of fusion of lead is 5.9 kcal/kg, and the heat of vapo vpqnc9 et0n4 93dtj)v/g/ +qds1xthfrization is 207 kcal/kg, and its meltineq 9s40ntftpdgcd hx) 3/ n9v j/1v+qtg 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 conductilzde pp-l7,.kvity of 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 of aluminum is tw4goes :xh3mx gl1 o69fice that of brass. Two rods (one aluminum and the other brass) are h3:sxm1xfo 9ogg4e l 6joined 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 $0 \; ^{\circ}C$ 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-cmk1e:b ddr q5w/ pm,5cr thick has dimensions of 3.0 m by 1.5 m. If the outside temper1qr/,dcpb5 we:drk5m ature 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 dimensions of 3.0 m ;k3.8 yofcy ,( go)du7amcos jby 1.5 m. If the outside temperaturecc)y dk8 . o3,uasfo 7gyo(j;m 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 ;lbs x-2uwsy).0 hour through a 2.0 m x 2.0 m section of concrete uw- )bs lsy;2x($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 hemb ,7rx,/ mgajsu;e vwr mh*6e p8(:cqat 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 tempm );un :ef+;vy c ts6yn13nbsierature 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 refa9jw:xfw e7rd+11fdnqbl t ;/ining steel, the temperature is monitored by measuring the radiant power emitted throughd;le79qxdr w1:fn/ +afb1jtw 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 energy when ing ;se5:u x r54ysn6dqt 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 collector (effective collection area i yj2+:nr)+l y 1qptsy 8dznk6of $15 \; m^{2}$) 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.