Which of the following is the smallest unit of heat d vxife4gyo47y64swi -0yd8ld 1fz. b energy?

  The amount of heat necessary to raise the temperat8xt.pq lkv gizbkhja7- b+/ p* 35vh*sure of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic eneregpr x c1 kozz(n873l,gy of individual molecules is referred to aelxr,n81gp7zzc o3(ks

  A cup of water is scooped up from a swimming 1qvxckxf pzf;z8:/r+z (6qd4 5u wdaudi* y;xpool of water. Compare the temperature T and the internal energy U of the water, in both the cup and thwdpx c1;dx6 xk 5/z(q yfzvrz*+dau4uq:i ;f8e swimming pool.

  The internal energy ssvvz+2, fh ;xof an ideal gas depends on

  An ideal gas at STP is first compressed until its volume is haldx uq, ysuq.:6h+-p juf 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, - ,xd pq:uqhu6s+.juy the final internal energy of the gas will be

  An ideal gas with internal energ,*3o zu 6phrx0 tjlmyzbn- 6 7mj;fny3y U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary dra :le/cw+0)0 lki*wm vz sy5amcstically is that

  It is a well-known fact that water has a highgc g3 5by+rf d9;h;mjeer 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 st+ g yfjh;5md g;9ebc3ratement is true?

  A thermally isolated system is made up of a hot pf,td oq3,prmth(e-1lx p f45 kiece of aluminum and a cold piece of copper; the aluminum and the copper are in thermal contact. The specific heaf rm,hpk4leoq3xfdt (p,1-5 tt 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 liqui-fj8dlot* p7u d state is refero 78ptu -*jfldred to as the

  The heat required to change c4aar /p0 *p/bo2 k; qchzks0 st7in8va substance from the liquid to the vapor state is referred to0 n/hps7v40 bqscrip ;a*k2c a8tzok/ as the

  If heat is added to a p /hegz2e w0ca0b 8id0eure substance at a steady rate,

  When a solid melts

  When a liquid freeze6:js43o f8l*w vobrx7g, cp gys

  When a liquid evaporat:dfaa otbo(/ z3t(cc:e1x y4i x mlx:;es

  When a vapor condensesy nfdbs*l0b b,vol*;;

  In a cloud formation, water vapor condenses into water droplets which get bi3ns. vp (piho7gger and bigger until it rains. This will cause the temperature of thp.vnpho(7i 3 se air in the clouds to

  Turning up the flame under a pan of boilin :( 3smr/. vvpc4i ojm;vr:yuhg water causes

  Equal masses of water at e 3h it )0rug8k(iwyl*$20 \; ^{\circ}C$ 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) pshf1io; rdyd 1rxfk0( 7zx1 means of molecular collisions is referred to asf sy1o z)kprx7(1;fd0id1x hr

  By what primary heat transfer mechanism does one end of an iron bar become h6hsb(s7ex zs;ot when the other end is placed in ax 6;sszsb7(he flame?

  On a cold day, a piece of metal feels much colder to (fs12vegtsb , the touch than a piece of wood. This is due t ,tev1(fssbg 2o the difference in which one of the following physical property?

  If you double the thickness of a wall built from a homogeneo efc 1:c cgp1u6 mk+odw,a+.qpus material, the rate of heat loss for a gf. co w1g:dcpk++aupeq 1 m,6civen temperature difference across the thickness will

  A layer of insulating material with thermal conductivit s d/ahai 7/;ifm,b2wuw,ap- ty K is placed on a layer of another material of thermal conductivity 2K. The layers have equal-,b/ah/ ium f 7;aiwa2d,pwst thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat l+p5,zfti /2 zazwh +uflows by the mass movement of molecules from one place to +,a+z/lu z2wzfphi5 t another is referred to as

  By what primary heat transfer mechanism is a pot of water hyw b2r4n oc6al;d-.a peated on a stove?

  Convection can occur tbhps4fiyt m,+mdjw8 7.*q+r

  Which of the following best explains why sweating is important t.daq n(ba bb p0v-ocu1q,2 /yto humans in maintaining s2bu0, y/c.tv q-q1 (pbadabnouitable body temperature?

  A spaceship is drifting in an environment where the acceleration /v43y ;q29p bsk fn fhwraqpi+) x,z3tof gravity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is true about the convect2;pfp9ykn ,zq s/b q i3frh43vxta )+wion currents caused by this heating?

  Consider two neighboring rectangular houses built from the same ma)cw uuo 3:ng mdt6z23sterials. 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 thenuot336 z)mgc dsu2w: small house, the larger house would need heat supplied at

  If the absolute temperature of a radiator is doubled, by what faq:rb7 gg 0k6,p) kwb.sktoii (ctor does the radiating power c:pqot w bg6)bi0kri7. s(,kkg hange?

  The process whereby he(km5ndy:2osc+r n6 uaeo ) nk1at flows in the absence of any medium is referred to as

  By what primary heat transfer mechanism d e jv)+c)ja4wvoes the Sun warm the Earth?

  1700 J of work is equtox, jz5e/u a (i) 2j-lzgn)pkivalent to how much heat?

  16.5 kcal of heat is equivalent j4d4lcc9yr.zqs +r 2hto 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 temper)b /+gzm r0tuf7q2t ltature 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 p*o 3za qn4t:rjrb8s:1rrd.qcp,- dt 2.0 kg of water, what is the resulting temperature chang:q1td8 :zr*n a j4rrp.d bt-qr,s3opce?

  A 4.0-kg aluminum block is originally et / kpizc9ak-j(j()r 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 temeq1:dsl x(ksf)m 2wn rj26d1 rperature of 2.0 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 adding 5.0 L of wifk /nm ga)(/n+3zxh5+d bzqs ater 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. H2uxp 25l.fga tow much heat is added to the gear if the temppa .tl gu52fx2erature 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 meta fwx7tk *3qyvauc)r))l 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 copper, -/4 /ba:he(a rn ms4s 7unveu1qv;jykinitially 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 adm)fti u.:y2i(sh 5no 1/wwqkt $100 \; ^{\circ}C$ 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 its surr7kkhz2x. m)p joundings. One object has an initial. mp2z xh)7jkk 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 relav(6/ce30 +zb zuqr1m2ejfn p-ugpu0gtionships between various forms of energy by measuri- p rpg(n qu1/zc 2um+egjez0f3vub60 ng 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 Niac,r:i xtaqgq 8(ct8s2tnk ( *ogara Falls drops a distance of 50 m. Assuming that all the gravitational energy is converted tcis :8gxo(,tak2qcrn *tq( 8to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming no heat loss, how long woulqjpj-16c: cuze; j2 fld it take to heat wate6ulp ccjf-z ;j :q1e2jr in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. xxl5 y5p +zoru:i4mwrg9n, e0 How long will it take to heat 20 kg of water fzo5l5wru 9 +m0:x xe,g4pi nyrrom $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (jk 9v5dj9cuj; *v p*,)9kauac wumte3mass 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 (specific heatasu ri 80b-ae( = $0.11 \; cal/g \cdot ^{\circ}C$), 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 remov 5r58ml5pwh-dhwots9z.2wtqow6 o:q 7 lpk3ced from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. Hoyi 4i,s(,)a 9bdyrai bw much heat is required to melayibb)isd a(4,i,9yrt 200 g of ice?

  How much heat energy is needed to change bktb7ii pt7l y* - fgk0cj5 xair1z32*10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 1+n7b yrjo/ 71 efzqgjy/* ko)s1.volt00 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of i,;qqkzl-lm e pdzg3: 4ce 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 initiaf*bb6song) j 5dh 2qpsg9q4u0lly 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 ghula ss )p8bxcy+i98 .3q:mu $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 kgwhda7y5 g+arqjtbn6h 7 .;5txhz xm)rp 9d, ,m of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to change one gramp y.2a clzii )v6b(:in of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required to change 100 g yvke tcp ,rbf,:n l,(sf:u*6 h6 -sdsvof $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding ice to 1.8 kg of hot tea, in kj;4q5dob)qnitially 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 va0lgr1s:jv(k09ejdubnd- (op porization is 207 kcal/kg, and its melting point isbed r(j-:v9 g0p jdu(sno01 lk $328 \; ^{\circ}C$. 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 concss2wyd)*op7bh * u)pm6pgs;i rete 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 conductizqow8w h xfdee5 n/9.-vity of aluminum is twice that of brass. Two rods (one aluminum and the other brass) are joined togetherznq 9o- .85 xwwefde/h 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-cvfrw)0 xp k (.la9yap6m thick has dimensions of 3.0 m by 1.5 m. If the outside temperal9 kp) (yar.vp06 axfwture 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 m by 1.5 m. If the outside thl wtf gpy6vtsv (aeq-p441* 7emperature isl4v1 eqgv4 wyp(p* htsf67-at $-10 \; ^{\circ}C$ 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 cke/gww3ae *y4 o et)wl si5lm8 (n(a;yoncrete (mesayeaylgwl k/(*3()n e wi ot;85w4$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 h hy6i5v79om+q:o jnqv eat 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 i gmgy:r(ri,2( qqr(eis 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 use+z97oyij6pjc5 q w5kud for refining steel, the temperature is monitored by measuring the radiant power emitted through a small hj uz6wok9cq7j5i p+y5ole 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 it ivb/fu;s d)r c couortd-x, .19s 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 are-jy.z5r/ nznq)l o-w klu/4jga 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.