Which of the following is the smallest unit of hezhz x+m3uie.3 2d0ckz :osca3 at energy?

  The amount of heat necessary to raise the temperar:cl) p/a pc()gvz3u 8ydetj ,ture of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic a8mbtsh0; v :renergy of individual molecules is referred to sr 8mv:;hbt0a as

  A cup of water is scooped up from a swimming po naty)r6ej(8 )8-yv5vfnlp wbol of water. Compare the temperature T and the internal energy U of the water,tn)ypjlrv8 f e a58byw-v) 6n( in both the cup and the swimming pool.

  The internal energy of;elsg- ;a2tx(tk-dnt*-t xpc an ideal gas depends on

  An ideal gas at STP is first compressed until its volume 7yu1/mcvr:n3v4 har )5loq ngis half the initial volume, and then it is allowed to expand until 57yuc:la3h/n )qo14gmr vrvn 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 internal energy kvb,fwpa7c, )U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drastically is t od9,u6q vh (d /ppfa6lk5frn.35x qephat

  It is a well-known fact that water has a h:wgu,o -x/p g :yjwrh:ncz3 2/o fr)o.nu+ evdigher 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 statezc2hnd/:y ngg.ovo/ue w:+f-3 p j :),x wrourment is true?

  A thermally isolated systfj6c sw0ys(rhl sc8/ ;em is made up of a hot piece of aluminum and a cold piece of copper; the alumirws hsc6/c8jf; 0ly( snum 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 soln, md8wk)6 (59:di r dvdvlqkxid to the liquid state is referred to as t8vidr:, w6 qn9dk)(5lxm vdkd he

  The heat required to chan 9;wpb7 c+ge af+.zyszge a substance from the liquid to the vapor state is referred to as th cyg ze.sb+zwfap;+97 e

  If heat is added to a pure substance+ 65rz0bo2itjvf8k fi at a steady rate,

  When a solid melts

  When a liquid freeze8mocws wni./c 3- wr*ns

  When a liquid evaporaun zkp08zgkx3v6 5r(ltes

  When a vapor condensesi i44myxov +-n

  In a cloud formation, water vapor con f+t:(ajwiyr4 denses into water droplets which get bigger airj (atyf+w 4:nd bigger until it rains. This will cause the temperature of the air in the clouds to

  Turning up the flame under a pan of boiling 8k36aha 1lhm+8ddiq owater causes

  Equal masses of water at (*, : ri4c- b,zzk qg5psvnhqu$20 \; ^{\circ}C$ 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 byxr 8znu0nn,h 5 means of molecular collisions is referred to asxnzn8uh, nr05

  By what primary heat transfer mechanism does one end of an i d) z3v1pqvw;x* ahk8uron bar become hot when the other end is placed w va8; )3*vpuq1zkdxh in a flame?

  On a cold day, a piece okko/ 66vcbg d3/jqxl.. brr*kf metal feels much colder to the touch than a piece of wood. This is due to the difference in which one of the following physic6cv bk3/b lkkdqx/*jrr.og 6 .al property?

  If you double the thickness of a wall built from zg1ncx( ,f09jivd hf *0dv1i -0iijjfa homogeneous material, the rate of heat loss for a given temperature difference across the thihf z*00c ii gixfi(jv90,n1ddj f-1jvckness will

  A layer of insulating m3q/y rt3s ;epo eq6vv2aterial 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 of the cs2;yeq r3pq v3v/t e6oomposite sheet?

  The process whereby heat flows by the /*+m;: ncexfdr lu2g jf f)tr2mass movement of molecules from one place to anoth+fdjft;2 )/rl*m2: genx u rcfer is referred to as

  By what primary heat transfer mechanism i llz e*6)ob dc) tdumo d58)2xccd/bx/s a pot of water heated on a stove?

  Convection can occur5m.9;mnc;c zoeg s cm1

  Which of the following best explains why sweating is important to humanvluf; 2/0or3chux45q xi/zu ks in maintaining suitable body temperx 5fil/r hcz2v q;k /x43u0uouature?

  A spaceship is drifting in an environment where apab vyc-7/d6z deo(+the acceleration of gravity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is trueeaa c67 +-p(zvo d/dyb about the convection currents caused by this heating?

  Consider two neighboring rectangular houses wo5.wf:og m .6we 7 jrq,:mnjrbuilt from the same materials. One of the houses has twice the length, width, and height of the other. Under identical climatic condi ,: o. e .r5o:jmnfqr7jwwmw6gtions, 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 i8pkz y,a +sg2ls doubled, by what factor does the radiating power cha+ 8ga lspk,y2znge?

  The process whereby heat flows in the absence oa5go)6h p/y nbg,ixdc* 6 6dshf any medium is referred to as

  By what primary heat transfer mechanism 8ptr1uc phw.4+yqs x (gr -1+n(faz fadoes the Sun warm the Earth?

  1700 J of work is equivalent to how mu*jq3a2,xad* xrn ybg9ch heat?

  16.5 kcal of heat is equeg z g/oydo8+*/yxd)7n kag) nivalent 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 t naaybio*gd( /i;9m u/emperature of 100 g of lead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) by $15 \; ^{\circ}C$?

  If 40 kcal of heat is veud- *i w*g6badded to 2.0 kg of water, what is the resulting temperature c *eub gvwid-*6hange?

  A 4.0-kg aluminum block is or f 8f0skwo0ca :ei:f67muvh0o (e*thbiginally 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 2w+z. *9zj0om, ltewnb.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 addingv oo 8om5y8c0b 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 copp nn53hh )d7pz1m)pkrzuk fz,gs;a b78er. How much heat is added to the gear if the temperature incr3 m,1zadb;z)ph k8n77 f pgk5zhsu)rneases 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 heate8 a3i*it pkj(dm,ef h(d 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 cmwmpj3ny(g0r;p0k ;fmr* m 3ropper, 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 inyldfp .n h8 4v03pffo4a g03$100 \; ^{\circ}C$ 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 thermd p/2*j;jy 814a kgsy2dzidx y(zf:nzally isolated from its surroundings. One object hass yydn2 28*/jdz fj z( idax1y;4g:zpk 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, Jamrg6dx 6o1 frl5es Joule attempted to explore the relationships between various forms of energy by measuring the rise of temperature of water which had fallenx5dlr6 g6or f1 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 50 m. xt g yll1:6t(q Assuming that all the gravitational energy is converted to thermal energy, by wh t6(ql:tgx1ylat temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming no heat los tx svmpnn1cwp +we n97.. p8vo*k6-vxs, how long would it take to heat water in vxvp7*c-n6w+mn s..oxtepvk 8 9pwn1this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How long wi2 ( 8 rj.mngiazc;ja+fll it take to heat 20 kg of water from m;jg 28. zji(aaf+c rn$20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 10zii oo 7 +2lv93pcqxc000 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 (spe f/j;1asik 75ced:efcdn;o d/vavi- +hq*p 6ocific 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 liquidc5el bas t1t43?

  Ice has a latent heat of fusion of 80l hgb54/4gvde3g ckbz)t3b,e kcal/kg. How much heat is required to melt 200 g of,h/gg4lezk3t5d) b bcv 4ebg3 ice?

  How much heat energy is , co8t*oum/d .ty0kb yneeded to change 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removvho/vii1ii, ( ed from 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ik h t6-9xcd8gdce is 80 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 initial3 nk5/mlbxsq,ly 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 atpjqd-,8 u 3ss(b uxb0o0vvi5q $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 kg o w t.k *gwihwth4o-i(v ;;x;uff water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to change one z)ilm xyp4h*j.9 dta7gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required tx)l w3 gmf jl2yp.5tf;y-p(ex o change 100 g of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by addic,. vt9a3(;s.rw q lwmxd uwsu32j,:ct8mmylng ice 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 vaporization iyyzq* ,9vg +uzs 207 kcal/kg, and its melting pg+q yyz9uz*, voint 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 iw( dtrduy ;otlpy: :e(x/3hm7s $0.8 \; W/m \cdot ^{\circ}C$ 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 bbs6m gx2.q ks4rass. Two rods (one aluminum and the other brass) are joined together end to end in excellent thermal contact. The rods are of equa.b xm ss2q46kgl 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 1.5 m. If the outside tl ; 4qsqubd.(memperatu;m(qqu sd4b.l 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 dimensions of 3.0 -xil7i d(bjch8 h).(hvpyp:gm by 1.5 m. If the outside temperatureg-.dx ( hbph8 civ )jp7(hyil: 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 o3,uclzfn 94c through a 2.0 m x 2.0 m section of concrete u9, c4fno lz3c($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 tran4pk5 m0vgvp pes3v7 0osfer 1,000,000 cal 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 40 /md4y.*71k wlor:eb5sb abin00 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, the tempej 0uzmjf/fvc-/ cl *mdkp+9l 7rature is monitored by measuring the radiant power emitted through a smallkp9-f cf*ujz 0 m/ljvc+l7 m/d 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 wh9 ry ea,nz1rd:en 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 collector9yxs f8v8* guo (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.