Which of the following is the smallest unit of hea4 b6nex/o8icyqj . c.vl/1qb at energy?

  The amount of heat necessary to raise the temperature of 1 gram of water b3rp -b)8q 7)d2opaaydr,mjf py $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic energy of individual moleccg:b6e z4qky 7ules is referred to qc6g7zek y :b4as

  A cup of water is scoopr.v f9nc25ubxg /v h1sed up from a swimming pool of water. Compare the temperature T and the internal energy U of the water, in both the cup and the swimming pool.cfb s9gnu5. h/vrv2 1x

  The internal energy of an ideal gas depenzqu: 2q)sj: bads on

  An ideal gas at STP is first compressed until its volume is half the initial v+hc)wf.fwga 3wu99 y*h.vhv kolume, and then it is allowed to expand until its pressure is half the initial pressure. All of this is done while holding the temf9whwa. 3.9huycvf+ wh*)gvk perature 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 U a,g0fgs; bw9 mxt $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drasusnyjrp2)aq:ot5n .2,r9k gd,r b,gttically is that

  It is a well-known fact that water hasu8rgd8z(rt ) e5exu: k a higher specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibriumr8 ezg5u t)kxre8( :du. The same amount of heat, 30 calories, is added to each. Which statement is true?

  A thermally isolated systemj:lmkm7gns 4b:paz8j;fh u 99 is made up of 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 thatgpjsa j9n:9:4kuhz;f lm78mb 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 substanc) 6kcwwiw8ti0e from the solid to the liquid state is refer)k i8wi 0tcww6red to as the

  The heat required to change a substance from the liquid to the vapoi ;a*i*y:phhqr state is referred to as tya*hiqi;* ph :he

  If heat is added to a pure substance at a steady rat26p q/y/p yuqjzl. em1e,

  When a solid melts

  When a liquid freezesimd0s1(d/ r1)rts-to1ncan qp 2sz+n

  When a liquid evaporaf((+suv tx g:btes

  When a vapor condensep7xd fk3t2 d7 .zfl pl)fi9p(cs

  In a cloud formation, water vapor condenses into water droplets which get biggbdw:d1mo k9nv5u 4z g11 kmb8ger and bigger until it rains. This will cause the temperature of the air in the cl 1 kg89m1ovbwkgm4n:zd ub1 d5ouds to

  Turning up the flame 47jy*nq3n jor zvye+nm0.a/di l +,cu under a pan of boiling water causes

  Equal masses of water vcf3yy;s cx ,f-i/wq0 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 heat flows by m . oklu1a4fhi/77k nwjeans of molecular collisions is referred to ao.i47 la1wu7 /kkf hnjs

  By what primary heat transfer mechanizaxa89 n7k- j fhe(gyz 2z8eg24gj2vk sm does one end of an iron bar become hot when the other end8zk8z g72a a92jeegfz x (2ykhnvg4-j is placed in a flame?

  On a cold day, a piece of meta 7zeg zt2,aej +3ov)phl feels much colder to the touch than a piece of wood. This is due to the difference in which pzghje 72+v te3 oz,a)one of the following physical property?

  If you double the thickness of a wall built from a homogenesoz5v 9a-gvf;v8ga:tg iv:0r3 x8mjc ous material, the rate of heat loss for a given tejvgvaf88-0o g zm3 gav95 sitv:r:;cxmperature difference across the thickness will

  A layer of insulating material with thermal conductivity K is placed on a lay46m eed-sp: jner of another material of thermal conductivity 2K. The layers have equal thickness. What is the effective th endjm-p e4:6sermal conductivity of the composite sheet?

  The process whereby heat flows by the mass movement of molecules frx eiis:t3o / 0aot7q 2;x+osmvom one place to another is os+7/v; eioix:s xa2mott30qreferred to as

  By what primary heat transfe9ylf y zp3 *eamf5lb9cls(o.p p/. 0.mpzel,er mechanism is a pot of water heated on a stove?

  Convection can occuro:1:kc0 tgpg;8n wliw

  Which of the following best explains why sweating is important to humans in mada82z1j0;.+ qsx* w,p m+pkow hdjy rmintaining suitable bp ;z+ 0*, jpjmxdw2o8h+ 1qsw.amrkdy ody temperature?

  A spaceship is drifting in an environment where the acceleration of y5u9g mu ds2n*gravity is essentially zero. As the air on one side of the cabin9 uu 2*gd5smyn is heated by an electric heater, what is true about the convection currents caused by this heating?

  Consider two neighborinhe eybnl8 pb v81n3k-+g rectangular 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 woul8pvly -+be3 b1 nkehn8d 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 doubled, by what fact8j 9c *aj)rimr14ie sxor does the radiating power change?srjje i1x4r *m98cai)

  The process whereby heat flows in the absence of any medium is refezev75et 9qap-rred to as

  By what primary heat transfer mechanism does the Sun waru8rglpkr 32g) m the Earth?

  1700 J of work is equivalent to how much 5 sqbt-a9s kt;heat?

  16.5 kcal of heat is equivalent to how muchw6,k5l2a(htya soije 2f5 (l d 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 -fe62 dszzgd0to raise the temperature 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 kg of water, what is thedqmh2 8:aqnz)kc : 4no resulting temperatur:ck2nmqo4q 8) d: hnaze change?

  A 4.0-kg aluminum block is originally at 8ur*ui2i . mt ,d4sanu$10 \; ^{\circ}C$. 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 material 089jztrb/z/ bcxr3g jby $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath wa ix,isy/;e;lm bh0j k,ter 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 ( 0us v9zhj;sxiron and 0.16 kg of copper. How much heat is added to the gear if the temperature increases by ;s0zuj9xs h(v $35 \; ^{\circ}C$?

  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 heated tom zaf6h u*ey). $100 \; ^{\circ}C$ 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, initialltv:0b/c 0+4, bfkfosk8nvbqpy 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 atkj e*lfj1ric47*i(os $100 \; ^{\circ}C$ 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 ismabba3g+jq*+xc d4(m u z c :*9wu*kyj thermally isolated from its surroundm yz4qjba:mb3 +9*axuccw(*jg +k*u dings. One object has 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, James Joule attempted to us577n9:gx: tjqjo1 7lc yteoexplore the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc. What maximum7jtntlq17c5 s ojyge:9x:ou 7 temperature rise would one expect for a waterfall with a vertical drop of 20 m?

  The water flowing over Ni*70jq;2vxqyvj)ptnz1bqqpb / j6x8a agara Falls drops a distance of 50 m. Assuming that all the gravitationv p6x 8yn;/qjba1b*qxjq2)7 pvq0 tzjal energy is converted to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming no heat loss, how -vd+bvtw 5j) ulong would it take t +)v5tj-ubd wvo heat water in this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How l.i5u87*ljvxd0 w 0kazn bzv 8uong will it take to heat 20 kg of water fr0lvxz5w .u*uia7 d08 kbv8zjn om $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass f aaxe )co8a36fkr4 jase4-b 51000 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 k 9 p9h-fjdgv+f.:p8, sxz vrvtnife blade (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 48cb.1l 0.bs;0 y gre *f hkmxzc6msjg7sg9oyto liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. *vlyxb)kp8z -1a m)um How much heat is required to melt 8z mpk)ymxvua b l-)1*200 g of ice?

  How much heat energy is needed to chqrmq h oo44k0.tbiqk52n5s (dange 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed from 100 g v asmz8l0+q8/aap a9b of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg26hj z5-of59u ngxmjc 4ae1hp . 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 initial:n -xg vhe(t90xr/fb9zr zw.tly 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 acdaiqk8- bz/ 9t $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is 5up 9x8uaw zkd 4uqp7/needed to change 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is requireauig pb*b4be6ak8jhk, n8w ; 3d to change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required na9c3q k 85yqvae))vjto 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, cvp) (:(fyh:shu q2qpinitially 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 kf:-ajwax o6*z qxjb,: , fhg7wcal/kg, and the heat of vaporization is 207 kcal/kg, and, ob67gx *fxa fh j:w-zaw,qj: 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 concret +r6d9uss 8lklfq5m/(fi by+g7u2vaie 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 ofs2cr, olsm95+ugb5 p0a9xxce aluminum is twice that of 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 is main c 52mbsxs,xcpae0r9l +9 gu5otained 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 iwiq/tx17*. v orrc/gtemperatur1qi owr/ xit*/ crgv7.e 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 dimensic ye)svg9vf34ons of 3.0 m by 1.5 m. If the outside temperature isfyevs 3g9c)v4 $-10 \; ^{\circ}C$ 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 f+v 1 f5 8dpx-go;qr iu7fevd9wlow in 1.0 hour through a 2.0 m x 2.0 m section of concrete 9x5 8ruf7-+ wdfv vgo;pd1ieq($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 1,000uln8) v:*oxfa,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 4000 kcal of hqkn * ms* -op-lm-:glp yveaba:1wy4x(jl( v+ eat 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 temper4coy c;e ur fg ;-bqg8.6vf:gdature is monitored by measuring the radiant por bg u4;8:d;ggfcy qvo6f.-ec wer 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 bod6 (o n)qaqdvrt:vd (5ty 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 co0i6b 4 an1mayxvbirimwc .,w sjk/23 3llector (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.