Which of the following is the smallest unit of heat en50uq ,7)vy.bhbr bn dtergy?

  The amount of heat necessary to raise t dv4+xuk6k1c8j j ij,uhe 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 z9*j/)h7zo s r4n)xwn(pkexj is referred to awzj /)nn)e ps 9h*xr7x4 z(ojks

  A cup of water is scooee jr: bh*u:y2ped up from a swimming pool of water. Compare the temperature T and the internal energy U of the water,rje: :2ube*hy in both the cup and the swimming pool.

  The internal energy of an rd u44t dn855a l///j7 cdqkotvobj c5)zy1qyideal gas depends on

  An ideal gas at STP is first compressed until ph nd5el5 5eb5its volume 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 en5 en5ehp55b dlergy of the gas is U, the final internal energy of the gas will be

  An ideal gas with internal energy U a62m *cfwn;2iu - 4dk lwci2rrvt $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean tem7/lg0 vq -abefperatures do not vary drastically is that

  It is a well-known fact that water has a higher specific c)dtl5 w5l. gaheat 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 adde 5dltal)g5w. cd to each. Which statement is true?

  A thermally isolated system is made up of ;:cprywj 7adhcucw0( rx.1n2 a hot piece of aluminum and a cold piece of copper; the aluminum and the copper are in thernp ww :c;a(2crh yd7u0 jrc1.xmal 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 the liquidl0elvbt i1jn3, u7 *qw state is referred tv7iq3el 1 0tl ,uwjn*bo as the

  The heat required to change a substance from the liquid to the vannr hplt+ b8yt+ s :bpxh,)z-6por state is referred to nt)+tb6:p b 8 +lr-pznhsy,hx as the

  If heat is added to a puf edml9+n8 (qjre substance at a steady rate,

  When a solid melts

  When a liquid freezes-g g y.; gyvb5oignv;)

  When a liquid evaporatesxtkz algh.xomx ( 50;.

  When a vapor condens /li8nvty2-cqjd0 9nhes

  In a cloud formation, water vapor condenses into water dropl(/wfmcckc ) d-ets which get bigger and bigger until it rains. cf)d-w(k m/c cThis will cause the temperature of the air in the clouds to

  Turning up the flame under a pan3 a+s+ivd mvq,6/eq. 5:qlmirbkz5s g5fkj, r of boiling water causes

  Equal masses of water atl *jgn4;,n5swck5y wp 54 wvqg $20 \; ^{\circ}C$ 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 molecu5s:cw k tr8p1zlar collisions is referred to aprtcw5 s1kz8 :s

  By what primary heat transfer mechanism does one end of an iron ba0abokvdp5o n en43q8y07 pp:qr become hot when the ot03y qpaqb57 nopn4k:8 d oe0vpher end is placed in a flame?

  On a cold day, a piece of metal feels much colder to the touch than a piece of n34 8 4lntyk3z:p4b1qy yuyzq wood. Th3 ubyp3tnqqkn4z14 z:4ylyy 8is 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 mad+w,qbw(m u tw,yb6 -xterial, the rate of heat loss for a given temperqu w m, y(bb+t6xwwd,-ature difference across the thickness will

  A layer of insulating material witw) zny7ly7uu 7nxsi: ;h 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 of the ;7z:w ylniuy s7uxn7 )composite sheet?

  The process whereby heat flows by th0qe9i0ie10m y r +ao 8weskve1e mass movement of molecules from one place to er10mi91 qwoayvs+e k8e0 ei0another is referred to as

  By what primary heat transfer mechanism is a pot of wat8d o+uow;q :u:b-ngct er heated on a stove?

  Convection can occurld9hk*l2 i)bgh u 4t2m

  Which of the following best explainsw0mn/5oi9za la(e/5i t6u; sh xfxa7g why sweating is important to humans in maintaining suitable body temper g7o05lwau/ tai x/6;x(azhn9e5mfsiature?

  A spaceship is drifting in an environh.p rcpl(9o )bment where the acceleration of gravity is essentially zero. As the air onc)r(. bpo 9lph one side of the cabin is heated by an electric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring rectangular 8.k.,n eqhot1j5gusfhouses built from the same materials. One of the houses has twice the length, width, and height of the other. Under identical climatic conditions, what wouljh5qu8, ftk1 e.sg.nod 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 temperatures 0.eu0+a ygne of a radiator is doubled, by what factor does the radiating pos0.u neey 0g+awer change?

  The process whereby heat flows in the absencexzz6z di.// aw;c*dvn of any medium is referred to as

  By what primary heat tran.b0tad) tu9bzsfer mechanism does the Sun warm the Earth?

  1700 J of work is equivalent is) fc- uv4pu-;b3okdto how much heat?

  16.5 kcal of heat is equivalent to how much .1hfllp2qh(k 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 temperaturc4 hm u.nb +mb3s57rrmin oo8cq6u*/pe 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 k( t20quhl0wrkg of water, what is the resulting temperature 0rlt0u( 2kqh wchange?

  A 4.0-kg aluminum block is oriwua (ogr h 84w,g,haj0ginally 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 material7 8c8k +mbj69q cnhoon by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath water by - 26yegpumhdk,jz c- )0wgr +4r xuw6dadding 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 iron and 0.16 kg oks4iut - x42i(cjg+wsh).vzu f copper. How much heat is added to the gear if the temperature increases byh2ktz+wgu4)siji.x c-uv4s( $35 \; ^{\circ}C$?

  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 micz1d 2rkh,s gow (4 :ge(3jxbetal 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 cbriiu) eu0 +6gsjv8 6aopper, 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 atqa 52w(q9itiws2zju-ef f1i e -st )6s $100 \; ^{\circ}C$ 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 thermallyw8:pdxu c)yr rvls94 8t :th-a isolated from its surroundings. One object has an initial temperature of twpt r8-l4 ) 8d9s:vcayxhu:r $100 \; ^{\circ}C$ 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, Ja* ymdx)9orans(2h0 cn1 d-x hvmes Joule attempted to explore the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a0sx(-hx2cn )d dah9 *m v1yrno 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 Niagaiz4z5 bybyx 63( r9m+umkh(bira Falls drops a distance of 50 m. Assuming that all the gravitational energy is convertedy5 (ix6 bri9ykbzubzmm4 (+3h to thermal energy, by what temperature does the water rise?

  A 200-L electric water heatetk:f3 bdtn1ngg:w;cka9 0 kqa6h6 /nz r uses 2 kW. Assuming no heat loss, how long would ib g z a3fkhna1w/66qt9c nt0:nk:dg;kt take to heat water in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat ivj gaw 0je/ j89tm/h6water. How long will it take to heat 20 kg of water jevt69m wg/0/ ia8jh jfrom $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (massji)a5xn1q,0; j -dxqnexd 8jp 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 (spejg/g4-0 v,ap nvrv.4q q;khq7vw 9 qkncific 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 to chan*.9 cqe hl8x7ne;j2 o dq0klusge it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. How much hqkuo- 4nclw77,of); h x,vw2 djaa c)feat is required to melxaf )wk2q7),ho- l;wcvncd7oa4 f, ujt 200 g of ice?

  How much heat energy+y(-b/5x7kh dop i2zxunp cs.m3 2yox is needed to change 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 10e 4axsbkljqk 3 *0ixpbvgp*(l0 4 7u/m0 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg. When 50;s*u z 4n9i2x w-aqppc 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 initn*v.i cbis)a: ially 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 atek.qzx/kd6dy+)l 6d d $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to ch0wieb)j w oabur* / w4)n2eztvcs*:9tange 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to che -n7c10;zmj u djekjwp(,+ obange one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is requiredknigfk/cc v.r hkw:/ w.e 14eupjn 3;; 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 tea, in ynn 6y.:tfd4) opike4nxr -x:itially 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 o.bvlxz5* l k; y,;udougo*w5af lead is 5.9 kcal/kg, and the heat of vaporization is 207 kcal/kg, and its melting p*.;zloau b*xu,o5dygl;vk w5 oint 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 concretns wj(d5pamp+4hdui a;51d,x e 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 twice that of 3a yqem*-d4qns ;fu bm xff5(y:d3w9f brass. Two rods (one aluminum 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 isbs5:nyq fx w-9;amef3mdy 34 * (dfuqf 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 gybi* ,2bs(sc5fi4r g m. If the outside temperature i,b2*4scf (gsbygi 5ris $-10 \; ^{\circ}C$ 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 by 1.5 m. If th2dq25of, v 8lxh5i raq6+q cgce outside temper65vlxq +2d2c,qqfao8 i hr5cg ature 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 2.0ca owlb8eq2)*q e(w vm; (6gix m x 2.0 m section of concrete ((e82m ( vbgw)*i; q6eqclwoax$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 y5 -gxhvlpb4z 9w ;g*sfzzk*jo co /2/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 is lost 5eirxoi;wmq7t31c) e 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 tw +g *fitprl7 iecm5g, 8i0p.pemperature is monitored by measuring the radiant power emitti.i7ce fr0* p8g +giwppl t,5med 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 energy when rvd,xcvf(.i mo0 ocm.uq9mu :j(xv b1b(s (l) 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 collector (effective collection area of6tau .ujv; 0ofh((.v4r qfo 4kg;knk:2zka wv $15 \; m^{2}$) 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.