Which of the following is the smallest unit ofu952cap5l*jtrkitfk )tve )/h - 2o +hq7rbcg heat energy?

  The amount of heat necessary to raise the temperature of /dk/ lfrw7 ib mp.cm))1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kindyd++r gq xrh:v 3/d9xetic energy of individual molecules is referred to adr :x/r+9dh+g xyv3dq s

  A cup of water is scooped up from a swimming pool of wate/a:tk7xt- f, f c uvgzbt6+d5gr. Compare the temperature T c,b-7f:kta xftdg6gzt+ u5/vand the internal energy U of the water, in both the cup and the swimming pool.

  The internal energy of an idemf 8,dw8.9, g g 0d)9zyv,spcs gpzxewal gas depends on

  An ideal gas at STP is first compressed until its volume is halc66z yldh p rgkv-l1k:/g/u1t f 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 energy of the gas wi kdrhgc g-1uyv 6// 1zk:tlpl6ll be

  An ideal gas with int kulprl(n8tg7ixhc 576gqudldftu:) w5(h) *ernal 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 drasticallyv*i e-.y1my:*ael2 urt 2ge q+e)qol r is that

  It is a well-known fact tt0gmz * ayi x ;2fcbp//l/k9qy.gd3y ihat water has a higher specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in ther/9/im z.gi* ayft0 /lgydxqpc;23 ybkmal equilibrium. The same amount of heat, 30 calories, is added to each. Which statement is true?

  A thermally isolated system is made up of 5 dp8av5nka4d 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 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 eq8da5 pda45 vnkuilibrium?

  Phase changes occur

  The heat required to change a substance from the solid to thp1bd 2zcux;h- e liquid state is referred to 1 zhdb;x2 puc-as the

  The heat required to change a substance from the liquid to the vapor stwn0fyzwh q 7l2 /p31v2 y5mycqate is refer57 hv2m/n30 1 cqzqwyyw2lypfred to as the

  If heat is added to a pur+ uvlgrghe1m3/f5+j;h m zs+y5;h uqte substance at a steady rate,

  When a solid melts

  When a liquid freeze9 +rh/tydleeng932gqs

  When a liquid evaporate98ifj 4kuhpy( s

  When a vapor condenseu( luc a49pqa82a( whgs

  In a cloud formation, water vapor condenses into water cese; n9ta(m 3btj1c.droplets which get bigger and bigger until it rains. This will cause the temperature sjc9(b;m n1t3.tc a eeof the air in the clouds to

  Turning up the flame u2n2ee+oi*ma zw-q s4h yxz0fc af1k32nder a pan of boiling water causes

  Equal masses of watesck13 9s8c)4gjek7wml6a nnv ns*.nr4ij 0h lr 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 hewu.o81zt tnw- at flows by means of molecular collisions is referred to asw toztn- w8.1u

  By what primary heat transfer mechanis r 8 2+lwdwdv6n;vj0nsm does one end of an iron bar become hot when the other rd lw0 n26s8njv dw+v;end is placed in a flame?

  On a cold day, a piece of metal feels much colder to the touch than a o w/ kqw14vd+b ,gq,oupiece of wood. This is due to the difference in whickg,u w1q/ 4od ,bovw+qh one of the following physical property?

  If you double the thickness of a wall buiwz-e/ 0m8w fmglt from a homogeneous material, the rat0/ew-f wm m8zge of heat loss for a given temperature difference across the thickness will

  A layer of insulating material with thermal conductivity K is placed on a la74* 9ppggh4/val z0wy qn8jgo (3plygyer of another materiajp qp(va9g 7 lg4g/y0hy4gz3 *8npwoll of thermal conductivity 2K. The layers have equal thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby hev/e , /aitqf1gcx 6f.2na;lnr at flows by the mass movement of molecules from one place to another is ref gtnv c; /6qr fnlx21ei,af/a.erred to as

  By what primary heat transfer mechanpofh;m*c(0tvib rj 8;ism is a pot of water heated on a stove?

  Convection can occur(e r(-cna5r6xm dxkf*- :lurm

  Which of the following best exuorv7l 7nn67dq mg/kko9c7* gplains why sweating is important to humans in maintaining suitab c6 gmo/g o*n kk9qd7u7r7nvl7le body temperature?

  A spaceship is drifting in an environment wherei)a zqu u-gy:bqde bj1.4 y2*m the acceleration of gravity is essentially zero. As the air on one side of the cabin is2- miqdy1ej:ug )aqb.uz *4b y heated by an electric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring rectanfp hu4nv x-4s4gular houses 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 h4nup s4v4-fxhouse, the larger house would need heat supplied at

  If the absolute temperature of a radiator is doubled, by what factordwp n w vq,))pe1 z0)e6pw;nxw does the radiating)nv)pz16 0qn p)we;xww epw,d power change?

  The process whereby heat flows in t25y mvrphg(zy,6ufb6he absence of any medium is referred to as

  By what primary heat transfer mechanism does the Sunj,yot- /yh5x,hkm *p l warm the Earth?

  1700 J of work is equivalent to how 7 )x u54brqum+wku-usmuch heat?

  16.5 kcal of heat is equivalent to how tv/dn2lwek rez)s2 4. 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 12)2 zjvrlq+hptcpg5q3tk k /r 9b o7k500 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 temp,qr)b/dbx/u t eraturbux)d/ r/bq t,e change?

  A 4.0-kg aluminum block is originalhnz- qi8,y9 jm98 yprfly 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 kgdl) lhz+i;,:i d qgc1( hi38z9rviejo of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath water by adding 5.0 L of watp jkti(36h o6ser 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-zyy/uo)ua: g2iit*rbb 1a1 0 .cgknb much heat is added to the geaur1/1u*.a0y-i:yncktizbo ag )2gb br if the temperature 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 ) -qgjk;yqfp,metal 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 coppe fhq:q2,zzhs 3fxn5 p(r, 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 az*cjy9p9 )g4 cny*e xn). cuxrt $100 \; ^{\circ}C$ 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 upojjz ,h xwc+d6/,o0tq6fy71 arq h4n y a system that is thermally isolated from its surroundings. One object has an initial tempe q1z6j6ofn d0 yh,yx+ tjha, 4w/qo7rcrature 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 theme8922cmn*ttihje*e ff,/x r5hqk8g 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 tempe tt *2mhf2e 9hxmef 8q5cj,rgki8n*/erature 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 mj6 so( l(h4+ zkqf+af9 yme,y8rubz9p. Assuming that all the gravitational energy is con6jshz a9mrype8u b((zyf,oq+9 f4+k lverted to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming )dv .m(elq.8rv ) zhhyno heat loss, how long would it take to heat waterhd8 .zm )(e.lqyhvr)v in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How long will it take to heat w7.d67d id7eh6e kdb ofjv;o6 20 kg of water from d;dv7hwi7.6k6d oo 7j e6 bedf$20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 105jr ,bcyc vw2nq4l *xgs-v3iia ow y; )y)3ok.00 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 blafc1pq+vm1 l)l de (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; gts*- vxivg;akq2l1 from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. How much heat is req8:dk em7 vj.qd ar7ec3uired to melt 200 g of icejqkm8rv7dd 7 :3c.ae e?

  How much heat energy is needed to change 10 kg of icn kt/q: ,t9nq)d/koyce at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed fre tyz4 myr0x-r,a5m8bom 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of icb5io 8 e9+x7ovan)8rcg8wb nne 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 init 53m jm *spqy5ipz /53ggtyd6oially 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 atf;oi(, g;ykv.q 2 cxy(u eg8qw $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 17 j .eo+;h .pusf7ta ipilea r,xo3*r70 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is reqwqn bxj2;y g2 -vpd9d*uired to change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is requiwft1cv 04ivz p;05sbf red 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, indn3 uknsz7h 00s av83kitially 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 leadrrk0(igpxnl tr2 ik2 +8nk 0x3 is 5.9 kcal/kg, and the heat of vaporization is 207 kcal/kg, and its p +i(0x 2kr083gtnxkr2 klrni 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 1v w75 6v7p uonsv52l/n apfgsof 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 twice that of brass.a s0**2ogs3x3jyvwtayx mt m0e7 sg wu7e,8s+ Two rods (one aluminum and the other brass) are joined tesm3sa7 ss0w 80j*yw y2tgat , m+eg*v7o3ux xogether 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.o+rezu gs9*fli 0fm0;0 m by 1.5 m. If the outside temperature isf o+sreiz* 0 0g9luf;m $-10 \; ^{\circ}C$ 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 di;ubc sozh1z8 mck,2e,mensions of 3.0 m by 1.5 m. If the outside temperature is smoeh kcu8c, b1z 2,z;$-10 \; ^{\circ}C$ 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 x stb 0b0q*laj7fv ((hsection of concrete (bl0sa ((0bxjv*h q7tf$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 heat8 )5e xzo6+uv.dms/zzgh zk -n 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 through ay/ x-uhm1*/bpi(.j sfu:vqa z $4.0 \; m^{2}$ 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 monitoreac-,a,dn.ik 7glqf r :d by measuring q7nrdk :c- l,,a.figathe radiant power emitted 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 radiatin e.brdvml, v, es,2mja( zpk10qe91esg 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 exi8csx5 p7:-ejiqf1/ tevx ll3csts inside 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.