Which of the following is the smallest unkiozfwn64a q5c,f knqv7wgx -a(v ,f37i1;h yit of heat energy?

  The amount of heat necessary to anm njp*/ dc6k*+g+d.ly 3 ycbraise 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 molecules is referred be8jmbwc,949c*n vn f n )l/clto asb,mw*c)nn/ b cjl9ln9 8cfe v4

  A cup of water is scooped tae /ikgl8;t 6up from a swimming pool of water. Compare the temperature T and the internal energy U of the wate;ia/t 8 gek6tlr, in both the cup and the swimming pool.

  The internal energy of an ideal gas depend2 m+rt*lx*aqamf 7)s es on

  An ideal gas at STP is first compressed until its volume is half the initi;lojnv7oy 15y al volume, and then it is allowed to expand unjnvy 1 y5;oo7ltil 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 inter3 j e5p6iv r4vu7u0bn vpj.f2enal energy U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drao2yj ehn sq q3(;w,cp/stically is that

  It is a well-known fact that w dkx s:8ca);zwater has a higher specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equi cd;:a) kszw8xlibrium. The same amount of heat, 30 calories, is added to each. Which statement is true?

  A thermally isolated system is made up of a/ecd r i4,h0yq hot piece of aluminum and a cold piece of co d hiy0e/cqr4,pper; 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 substav0w,1h*uz4lv)sht riwdg;o * nce from the solid to the liquid state is referred to r,;4d ow hs*)*lth0v v1giwuzas the

  The heat required to change a substancagbftbmb56vua6 ;3a .e from the liquid to the vapor state is referred bgaum bt .3baf66v5a;to as the

  If heat is added to a pur, b5gpw a1oc*w/v-elee substance at a steady rate,

  When a solid melts

  When a liquid freeze/gmkz m*,jrx3 s

  When a liquid evaporateti(a:ku tchi74; q,vo s

  When a vapor condens(fc/7(e h (yvu rlc7lvgm:e7s es

  In a cloud formation, water vapor condenses into0zq*fq9t s7 frbnq)5 )1ongm q water droplets which get bigger and bigger until it rains. Thisr)qm 7gz qb n9* q5t1o)qfnf0s will cause the temperature of the air in the clouds to

  Turning up the flame undemn /kg lcbh+,wh2tbml, g:/1lr a pan of boiling water causes

  Equal masses of water aoq (dsy,w7 y6)k0lx) 6ernnjrt $20 \; ^{\circ}C$ 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 molecul:zzj3t .x np(hrro0feguz5, - ar collisions is referred to as 5:r,zpo0r-h. t(nez fx3zj gu

  By what primary heat transfer mechanism doe4 3u/:qq0hg8eny:vp xghb) wqs one end of an iron bar become hot when the other end/:u )vyghwegqpq :b4q hx38n0 is placed in a flame?

  On a cold day, a piece of metal feels much colder to th h:hc ) 3vr4scglza,;le touch than a piece of wood. This is due to the difference ihs a c:;)3,h4gl lrczvn which one of the following physical property?

  If you double the thickness of a wall built from a homogeneous material, the ra,em;*dfhvp2rkj3o (u f 0 2emkte of heat loss for a given temperature difference across the thickness we kv 2d2(r03ueff,mj;p *h mokill

  A layer of insulating dee x3bopr00uxsm 9m+ 4+ bk*vmaterial with thermal conductivity K is placed on a layer of another material of thermal conductivity 2K. The layers have equk+ 3 d4re+0su x*bbm09pvmeox al thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat flows by7 o7qafg4.3 k2ezdsdmbav: b, the mass movement of molecules from one place m3 a:2aof,eddv4ks7z7q. b gbto another is referred to as

  By what primary heatveqzu1-),0 0ghm qkgy transfer mechanism is a pot of water heated on a stove?

  Convection can occuro//dcys , nipd nh3z ,pa0jr,3

  Which of the following best explains why sweating is important to humans in mxo mh*c2r rg./yd x/m rvu8f85aintaining 2dr/vmgfmc8 y5 u/ oh*rrxx.8suitable body temperature?

  A spaceship is drifting in an environment where the acceleration of gravity iz qhu+b bom /6rw.f-9jk+6uk es essentially zero. As the air on one side of the cabin ++zb 6 f-ek 69jhw/uqubk m.oris heated by an electric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring rectangular houses built from the h.u:usv0+f4sr uf1i/;x r:t ;hdx gqlhp 2v4usame materials. One of the houses has twice the length, width, and height of the other. Under identical climatic condit4/hu;1druv u sgvh: sq t. ;i:rpuh+f2 0lxfx4ions, 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 dourq:*86+q2mbnw.dca +qmemw8 sfj k5ybled, by what factor does the radiating power chane a k 8sy 2jrw8.qfb++mm:mdqnc*wq56ge?

  The process whereby heat flh b,fq(l.9 ancows in the absence of any medium is referred to as

  By what primary heat transfer mechanism does the Sun g5w 0e i; ay 17swyomx7-ib4vuwarm the Earth?

  1700 J of work is equivala ybva9zt( i fbjy86tga3y x g2p+x60.ent to how much heat?

  16.5 kcal of heat is equivalent 4tj3gmmpfxr.) m,y5s to 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 10r nn6hko1)c4 p0 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 resu)heh w6q1pli nt/qngg/y (j9(pti*h07 mg-xblting temperature ht*) //ny xg thp0(liphnj 79w-6mge(1bgqiqchange?

  A 4.0-kg aluminum block is 3;0v e1un,oqz2j 9qpdli8mfdb hm;6woriginally 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.e1x;mk fpy0 ew3mw-g8ng-p2 nfrz2w.0 kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat kqxg)(nxkl891m cym ( up 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 of iron and 0.16 kg of copper. How much h3yq* )b2j lyu ege/f7veat is added to the gear if the temperature increases vy el/ug)eqf bj3*y72 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 oqqwr5 b2x- z2heated 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, eoty+ gowc98a56k+b s 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 at f 7/it i8kxtmbnh/b. 8$100 \; ^{\circ}C$ 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. r+3gxo9p9meoz cj4k its surroundings. One object has an initial t zg e9+r.oc jom3p4x9kemperature 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 relationshi3h cy0jp8i /zgfwi- z*ps between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc. What maximum tem/y8i*fwzgi-0cpz h3j perature rise would one expect for a waterfall with a vertical drop of 20 m?

  The water flowing over Niagara Falls drops a distance of 50 m. Assumax 3729prq kdu2zc; pling that all the gravita9q2ku2 a7pxpd l 3zr;ctional energy is converted to thermal energy, by what temperature does the water rise?

  A 200-L electric water h s mx56una+f 0iz7x)5tg 9ls tozp4m9jeater uses 2 kW. Assuming no heat loss, how long would it take to heat water in this tank a5mjg974si 0+ xnflzp t5zx tm9u6os)from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. Hof+ 7a vayc3mvx* 4p0jww long will it take to heat 20 kg of water y0fvx* a4 3mcwj7a+pvfrom $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 18c3q v-a o4e+f 3;dl3dwna fwj000 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 bl y)j9 n,lyn7/g,4bl mbptmpt9ade (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 be removed from steam to change it to liquh,q;uf*t ;gi lid?

  Ice has a latent heat of fusion of 80 kcal/kg. How much heat is require0* pz tf-/ogsl;btjm:d to melt 200 g ojts*l/mgbfz0t :;-pof ice?

  How much heat energy is needed e1k61okge6s(5 ph q20el klbg4pa x4d to change 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be r)wo:7 a hr5zm3mllv (demoved from 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 8k)cvb9 5;idkz 32klctbxk4h80 kcal/kg. 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 initia;aywz ;fi,t1h lly 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 )w5vqjf,zcw jb tc9zp9 r 05q2$0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed thr 12hq1yq wf p02vw5io change 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is requic jjk7id t0)kcd7q7a5 red to change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required to change 100 g; 5+uavqqcw lc0jbumb7k9oa 4s cr)2 ) of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding ice to 1.8 kg of hot4y+3/f1tmscx:sk 7nr)wit l3a6v7y sing8sb 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 704h hcjwg a3f) 2iez,zw7neh0l:ofqis 5.9 kcal/kg, and the heat of vaporization is 207 kcal/kgwn j 7wzqf ,he )ga0h7h3liz0 42:foec, 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 of vbvh2s980hq u g- :8gnzvh7ruconcrete 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 brass. Two rods (one4 y+six; +cxc 5xfqnrj*g5bc2 aluminum and the other brass) fy*x;sig5 4crjcx2+qxc n+b5are 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 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 +xd jkm)x;;emwfi:5m ovz1 q)7twny -of 3.0 m by 1.5 m. If the outside tempzwx f:)y7- w+qmko1d nx e;m)jtiv;5m erature 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 ofynll .a pcj0h/l:;2o(xsx) ds 3.0 m by 1.5 m. If the outside temperatureldlp.lh/n ssc)y02 x(joxa ;: 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 2.0ahrdtbo3p 3it5f4p+ (qqpq ,7 m section of concrete (d a,tp 3p7(pbthri354+qq f oq$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 o+m5(d(rfqxh+x 6 pq9hat3 swaf 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 temper9vqe,,r bx v,t ,8eeujature 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,typ ic8ck: a)e6+kj)l the temperature is monitored by measuring the radiant power emitted through a small hole p:)c tl+i)jyac8 e6k kof 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 bodyqhf, swko243j9wzz q* 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 solar collect/ lc hbup1c8*ior (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.