Which of the following is the smallest unit of heat enewq) +1u+ ovrb obn8gfbh2 s5d:rgy?

  The amount of heat necessarzr/. bvsncvi n5k(s;+ sx-1- ir,xzfwy to raise 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 molecu patkmcy.)g-ym5:(n j iu2qr6les is referred to )yju6g2pir.ym5-k:ta nq(m c as

  A cup of water is scooped up from a swimming pool of wyp6i*md j:xmc-5fk )water. Compare the temperature T and the internal en -xj *m5mfp 6w)dyikc:ergy U of the water, in both the cup and the swimming pool.

  The internal energy of an fw2a) 3a,by txn3zzfi+s) pw*ideal gas depends on

  An ideal gas at STP is first compressed until its volume i2 x-l azd1+-nqssd ow htm4mpa6z )m0,s half 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 will -2+,t slxqz) -1m m0padd46 awsmhonz be

  An ideal gas with internal energy U a /+dziofykslrm a h 1,2m1:js,t $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatw/zy (-ibyt9o ures do not vary drastically is that

  It is a well-known fact that water has a highy;u l;kvd0q pab 1sc k0)de+i.er specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The samedyak; id p00l1 qvu)k;+.sbce amount of heat, 30 calories, is added to each. Which statement is true?

  A thermally isolated system is made up of a hd ;63weg6bf +sxb3oqm *rhf.w ot 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 experiencew d3s3+bf;rfo.6bm6wxe* q ghs 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 liquid state is re. raz0d3y:fe(e0 yll m./tn vuxv 84lcferred to as thealy8mz.4ut r.ee yvl03xcf (nv0:/d l

  The heat required to change a substance from the l)9u;:6xz3 hrclenhbrk;;o nri1oxl/ iquid to the vapor state is referred tob;: z o9;nkhi6ro/n c3 );x urrlelhx1 as the

  If heat is added to a pure substan+3j2jhs//yp h dr n11wrse ok(ce at a steady rate,

  When a solid melts

  When a liquid freezednf5xji 2ouc /9q v5+as

  When a liquid evaporacf5f06 mu3 rgqox, s(stes

  When a vapor condens8xsy mjtw(ip8) ja.e, dr94ot es

  In a cloud formation, water vapor condenses into water droplets which get bigge l0sm**wc9xlnm 1(iq, t jf9oer and bigger until it rains. This will cause the temperature of the air in the c*s9met1 c l09njolqxf*i,w m( louds to

  Turning up the flame under a pan of boj6oi9cl2 .qif z-d o,(jhm;l yiling water causes

  Equal masses of water - .uger dgm5 dcbyfd3h1 u/23dat $20 \; ^{\circ}C$ 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 bp1,ikd .wxd)qy means of molecular collisions is referred to asiw)dxk qp1,. d

  By what primary heat transfer mechanism does one enyz 9e+q-(lv m dm8fww*c e4ag(d of an iron bar become hot when t9g we*mzcd4l8+q vm fy((ew- ahe other end is placed in a flame?

  On a cold day, a piece of metal feels mqq1v)t n;wc m: nuca87uch colder to the touch than a piece of wood. This is due to the difference in which one of the following physical propertyqtnv;w81ac:nmu )7c q?

  If you double the thickness of a wall buil9 pp4un48ndq e)luq 3kr+6zmat from a homogeneous material, the rate of heat loss for a given te84merd3p zunlq6ka+pq)4 9u nmperature difference across the thickness will

  A layer of insulating materiyb3))cstgr/ a : mf6:* nrkmi *6tjdbral with thermal conductivity K is placed on a layer of another material of thermal conductivity 2K. Th ymridmg/naks:) 6rf*6 jt *:cb t)br3e layers have equal thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat flows by the mass movement of2bgfez(v n;fq t(.,icbz)l 2o molecules from one place to anot)vzb2 ,gocq;z(ibn2e.fft(l her is referred to as

  By what primary heat transfejz ppc(,1zir//jcr z82b 5hi euf8e0ir mechanism is a pot of water heated on a stove?

  Convection can occurom -: vnvs5lg2

  Which of the following be528o dv fukdw4st explains why sweating is important to humans in maintaining suifou2dvd wk8 45table body temperature?

  A spaceship is drifting in an environment where tc h si6pyo ys,(p wwm04kt+p,t6u5h m)he acceleration of gravity is essentially zero. As the air on one side of the cabin is heated by ank,s im wyt,m yph+u)shto4pw p6c605( electric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring rectangular houses built from the same;t3 5 rr7vizxt materials. One of the houses has twice the length, width, and height of the other. Under identical cri5vtr;tx7 3zlimatic 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 house, the larger house would need heat supplied at

  If the absolute temperature of a radiator is doubled, by what factorfifq.)c hrfu/f7 4/gq does the radiating power )f.q7f/ fc/ h4r ugfqichange?

  The process whereby heat flows in the absence of any medium is ; kur c3l(-nz/b;tj upreferred to as

  By what primary heat transfer mechanism does the Sun warm the Eart gd*7 yw 2-1(pvfgciijh?

  1700 J of work is equivalent/,e-hb 5w fn5jn rcqxlkg+ 8mc1d l3,x to how much heat?

  16.5 kcal of heat is equivalent to how much workm2ake63vky ;l 4hnh(u 98hnby?

  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 100 g of l,u 5vpmx8xiqx4lc:r * ead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) by $15 \; ^{\circ}C$?

  If 40 kcal of heat is added to 2.0 kg of water, what is the resulting t3md, hm0wf/mzjr ; v5eemperature cmw0rhf v m/jm5dze 3,;hange?

  A 4.0-kg aluminum block is orig0pkn f/bbdmy 96ak6tb6ln4h. inally 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 2.0x d1ry7)8gh u)eflz a 9lx;dt8 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 add. 398gcbuwh r7irua l* q4ggoju-w (x;ing 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 iro c:*98bmzduixn and 0.16 kg of copper. How much heat is added to the geuid z8*bcx:9m ar 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 9h0cu prd;0wp5 o2 bxlmetal 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, initiallpd z c8tsvr8b4g,.+pcy 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 .4epdt /17ztki or5 6h )2ratx*bmstiat $100 \; ^{\circ}C$ 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 therg,5 ya14f1ddgrj6tmc f -kj a/mally isolated from its surroundings. One object has an initial tem4/5ca gtmj fa61,-dyfgd1kj rperature 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 relationships )tbaz+v 5sv; j,zh-vve5nu: gbetween various forms of enerzvsj v+zva:b)ugh5v-5 t;n,e gy by measuring 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 Niagara Falls drops a distance of 50 m. Assuming m b1 f-,u,n9y43zz zjzoye(nfthat all the gravitational energy is converted to thermal energy, by what temperature does the water rise,n nefzm3o4 b9(u- jzzf,y1zy?

  A 200-L electric water heater uses 2 kW. Assuming no heat loss, how long would*b 4xj3g,gre d it take to heat water ing,b jx3ed4r*g this tank from $23 \; ^{\circ}C$ to $75 \; ^{\circ}C$?

  A 5000-W heater is used to heat water. How long will it oyd oyh9cno3i-edl :h6m0 54wtake to heat 20 kg of watemo y69yd3e0-4 docn oli5:hh wr from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 1000e.:hxbc5.i)r ur*hwc ycf )2h 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 (specifiun 8c l j1, ikg3.oxahs)-zg0oc 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 oa8vn6n f z( ovy7a ):c3(ofvvremoved from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. How much heat is required txr4s;o:w mh:3v6k9b7 rwy*nrygqbr8 o melt 200 g ofy v wb3*nkr;xr947brqhmg:6 sr : owy8 ice?

  How much heat energy is needef0lsh zs4k+ah-0 acl 42, umxvd to change 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be kla 3qr6kz) :8pxa* msremoved from 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 8+t(-vqqxd 0 )ccco m7d0 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 initially at e3kz,q23)cjyg vvti -msu94a ofqp47$100 \; ^{\circ}C$ 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 6;qlfu;a btk;$0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 7d tth)h.t.nu4o pif vg64yx8kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is reqc (7c10awwicyq 86py vuired to change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is requiredckw3.d uygh c59mkf+ 7 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, initially a5ccw2wtap0* r t $80 \; ^{\circ}C$. 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 vauy* y ppl,rwmh+yamgt6g7o- ,2 8jti6porization is 207 kcal/kg, any u 7, mijwma8g +ryt2yl-pt,gp6h*o6 d 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 c a,gs0m21:zrc ogkc4r oncrete 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 l(n*9q5wl 9y o0iyce f(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 brn(05eo*99fl yqywc liass 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. In1:d2atxr ,3 wxgj3uff the outside temp3 au j1xr3wxnf:g,d2 terature 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 uv h4id ho-dn*.x*8m wthe outside temperature -8 d.nduh**xv4 hwim ois $-10 \; ^{\circ}C$ 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 fhnjs3wt 7+1*j tr0mfx 2.0 m section of concrete ( tjh 7rtwj1f 0nm3f*+s$k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 heat throu 1 +emdcddjphs5w1..i gh 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.tzhf(kns :z(kvu 72 l 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 steelcrg/e g;8yne h+dajujxizl+: 4w3(j.whs7 ;l, the temperature is monitored by measuringglnx3ih7w sa dylju8 .:; j/ghre(4;c+zj ew+ the 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 radiating energy when,hqpk yb9707fm,qxlv4.t vi(1 hhbci 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: ru-w9bya4hvqn .n t.ti/ ste)y72lg 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.