Which of the following is the smallest unit of hea9g 6xb5 jexy0nv in,) do:zx:mt energy?

  The amount of heat ney+ josgrq7s 08sqv 3)e6f6tcccessary to raise the temperature of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic enerp/ oc8 pmq)w7k:eei g0x(sn1mgy of individual molecules is referred to nk 7wcg08m: s)eqp/i1xmeop( as

  A cup of water is scooped up from a swimming pool of water. Compare the-w; q0d65*sstggrwzr temperature T and the inte; w-tr6wd gzgr*s 50sqrnal energy U of the water, in both the cup and the swimming pool.

  The internal energy of an idealf w f;x:-.re+sy-*vrox) mx3 pf8l mwv gas depends on

  An ideal gas at STP is first compressedrpx(wd0;q ec j *3c2li until its volume is half the initial volume, and then it is allowed to expand until its pressure is 2jx r0ci(w *qe;l3 pdchalf 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 energ aknf2sfl (+tq/dos -(y U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do nze/(dou u02.)dqi.z wl6hw)2oet wm3ir 1l fm ot vary drastically is that

  It is a well-known fact that water has a higher rq:qa )tf7nhap ;:a*ow3hcv 2 specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. Th;tfcoa ar n723 v) :aqh*:wpqhe same amount of heat, 30 calories, is added to each. Which statement is true?

  A thermally isolated system n z4o: tee8(3pphqtwm ) f7uv;is made up of a hot piece of aluminum and a cold piece)eom4qhpv3;f 8tp: 7 ue(wztn 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 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 the solid to theh9+q7,qm 5 wulm9f ic 5-aluaq liquid state is referru,fl +95cqq7w9 imuaq m 5l-ahed to as the

  The heat required to change a substance from the liquid to the vac7:m*n qlsei,ie:) jy6d bk (mpor state is referred to as7:kln6*d:) j (c iiqemymebs, the

  If heat is added to a pure substances*-qjq9oh6v tte 2,wxeo00lk mw8z6 u at a steady rate,

  When a solid melts

  When a liquid freeze7 kao9hgo1n 54nqvrm*s

  When a liquid evaporqpjp;zpu 8; aky/y 6,eates

  When a vapor condenses,jk2htni1v y,ze. a6 w

  In a cloud formation, water vapor condenses into watesig+ wdu jnw8,)lwm)m 0jp0p)r droplets which get bigger and bigger until it rains. Thiu +gw0d)wl)j m0mwn,8p)pi sjs will cause the temperature of the air in the clouds to

  Turning up the flame u 8(y(9m 7( p:qqy(ovb ,e6kfxkjlpdxxnder a pan of boiling water causes

  Equal masses of water at /rm ed) pa8fc)$20 \; ^{\circ}C$ 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 mole *le7w)nur8eny4 *w 2aoqrpf. cular collisions is referred to awy8w7 r*en.fl o)rua24p* e qns

  By what primary heat transfer mechanism does one end of an ir )v8us3x rveuqo 3+/ulon bar become hot when the other e lr3qxv /uesuv+o3u8)nd is placed in a flame?

  On a cold day, a piece of metal feels much colder to the touch thd 34nb6a o4/rvz4 :nndut+ hiban a piece of wood. This is due to au d6n v4tib:/bzo+dr 4nnh43the difference in which one of the following physical property?

  If you double the thickness of a wall built from a homogeneous mater80bi9 7zrz7ij0 wk3tg;nzwf xial, the rate of heat loss for a given temperab zkwz 9gn78trwzxi f3 0i7;j0ture difference across the thickness will

  A layer of insulatingx6ba.svh0a n 6y* 9idrz) ornke+/j8j material with thermal 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 9asxo6*.nb8)+ /jdv6raerihk n jz y0 of the composite sheet?

  The process whereby heat flows by the masu- 6/r9rteigr w.*dryk4q .p ,bdb g.es movement of molecules from one place to anoth wdr-6pr4*q bytkrr. du,./g.geibe 9er is referred to as

  By what primary heat tran+z h8zaa toh5x jtzu0-4mib,c/e6ja2 sfer mechanism is a pot of water heated on a stove?

  Convection can occur4 .m o4teom(4 op/nhnl chhn3n. f1;lu

  Which of the following best explains why sweating is important to humans in 3le 3qd t1kec1maintaining suitable boddelke 3cqt131y temperature?

  A spaceship is drifting in ant yqd+ 8ouh7(k 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 thik (ho y+8tq7uds heating?

  Consider two neighboring rectangular house -x: 1owa sw(ezrj1t9r9w3ozjs 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 z-x waj(e 9rtow orzsw91j3 1: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 throk v6 r(sk1egk, i 8r5ucr0 kji(,:h2v2qhlqe radiating poweri,i(0u(rh g2 l: 8 jo2ek5khcvkr1 s6qrk ,qvr change?

  The process whereby heat flows in the absence of any mediu(a a+l ie17b;xsop ofb4w*c+f m is referred to as

  By what primary heat transfer mechaniaefcz.:rawm +k(qo 2e,nki-: sm does the Sun warm the Earth?

  1700 J of work is equivalent to how mtmenslv+p2mh /8m76n uch heat?

  16.5 kcal of heat is equivalent to hogwc43 1p zbf. h;yd6xj-rl8msw 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*( se(.zypduajnf/q 1 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 the resulting temperaturk mdo- o,o ha:2cmpl*2e changp oomkoc :,2h*-2la mde?

  A 4.0-kg aluminum block is originaa j65eyk+u u8(7 kkbtf.*wqdh k1 ctb.lly 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 temp9m on/ w/cj)mrerature of 2.0 kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up s-1z xd:sxr;fher 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 of ironb q5ql9m*b itl0y5)z j and 0.16 kg of copper. How much heat is added to the gear if the temperatuly 95qtmji5l0bz*q) b re 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 tu w k3)uf3 0wprc (m9zoeb;1jlo $100 \; ^{\circ}C$ 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 coppao)ji 4cl 3hj/er, 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 atcqm+ .bc-y w8j-.cf ug $100 \; ^{\circ}C$ 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 therx l5uimm58 +d,p;dgyv4xw kpseh, 3a5mally isolated from its surroundings. One objeciph 3 ;p,5x4mwu85axlsy ,+vkm 5gdedt 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 relanx8ht(bvh2 moxx5 9n(qn-dfw,g (wi )tionships between various forms of energy by measx nwv b9it g)x (m28d5(( fnq,hxw-ohnuring 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 of 20 m?

  The water flowing over Niagara Falls drops a distance of) ozcwl x2w8. dy9q)kb,upe9c 50 m. Assuming that all the gravitational energy is converted to therma wc.z 8o)debxckq9 9y2, uwl)pl energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2hg2sy su4+7p 1 lj1jvsdvpa03 kW. Assuming no heat loss, how long would it take to heat waterv 2g014 ydpps js3+v1 suj7hal in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat waterg9n fi,tf: 1v,mh;nc2qk4cj4 bf) cqf. How long will it take to heat 20 kg of wk ,)cn cq1 ;:gc4 ffn2hb4m9f,fqvtjiater from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 1000 g8i buny(b v2-mja6e+8a 2pd mp, $c = 0.22 \; kcal/kg \cdot ^{\circ}C$) 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 kni 53ztz-5kwlnj-b: 9aj.xsdjsfe blade (specific 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 bev7+,jtt1h vgb9 idwfue dwo91: p ,ny9 removed from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kca2yp( yf5, lg7kddzv+ql/kg. How much heat is required to melt 200 g5dp l , y7kzv2ydq(+fg of ice?

  How much heat energy is needed to cha,(o0wk7: xp4nwubjo ange 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 100 g o.c:s:mb uug1 jf $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg. When 50 g f5q/hlyv3 o2tk1 dwp 5p+f(xu 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 init/:r5udhifahs. qui 7hq3v;3iially 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 a-1qq1qpu uj 76sff7qwt $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to ch6 (faxt:kv3u(i++u,o,ht hqb5tolar ange 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to change one 0l 2 ns y+xols7qip5a5rvu: 7xgram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required tbpbkgl)unkoo3 ,464y*z2 ph wo 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 csa*)k, ri iv-iuh6.cb r; r+uof 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 kcalsqwj5 fzhocmggo3190jte 8 .* /kg, and the heat of vaporization is 207 kc8sc1hmoj50*zgwqj9ofg t3e . al/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 $0.031 \; kcal/kg \cdot ^{\circ}C$)

  The thermal conductivity vd*)pyn gul n54noha69c 41ps 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 alumin88ov4by do 0hese- k4zb+zw, 4huia1num is twice that of brass. Two rods (one aluminum and the other brass) are ju szhvyw4 ihed84 nb48ob+ ,a0ez-ok1oined 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-cm thick has dimensions of 3.0 m by*1:k q ykqw;1qq,mevc 1.5 m. If the outside tq ;*:kywqq,c1kq1m e vemperature 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 thz5dn)fv2zaaef k2,:sfd + y1xick has dimensions of 3.0 m by 1.5 m. If the outside temperatzkn fsdx152vyef za)+2,f:d aure 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 a 2.0 m x 2.0 m section of concreteootl+9e :z6 qe oze+e 6:l9qot ($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 cotl/9x)4 qhb3tk z9bxh5 c be9al 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 temperature if 4000 kcal of heat 0kd g(q;hv6xo 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, the temperature is: b1jh b8 ylxjx2tjh6( monitored by measuring the radiant power emitted through a sjx(y8bh1jb :2h l6jtxmall 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 radiat5p+r)al6crcqs 21uj ving 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 +jvobo0q+i8 tinside a solar 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.