Which of the following is the smallest unit of heat energy?6b-hjv.1)soioew; ray r5rnu vvg69)

  The amount of heat necessary to raise the temayn*;pm s-- 77g uerqxperature of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the average kinetic energy of indivi;.o x o7z gsmyg+ld5l1dual molecules is referred to a;g s+ogxo57 zl.yld 1ms

  A cup of water is scoo4lbwo* qko :n2ped up from a swimming pool of water. Compare the temperature T and the internal energy U of then4 :k2 o*wobql water, in both the cup and the swimming pool.

  The internal energy of u767hv375 lp tofqr,h+ g upajan ideal gas depends on

  An ideal gas at STP is first compressed until its sj0(wy8dr0dr q u,t/gq k6nf gp,)m: zvolume is half the initial volume, and then it is allowed to expand until its pressure is half the initial pressure. All of this is done whilnpf:du/gr k0,w )6j(8,q0qzmdts gyr e 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 U atj8 8+ dcdm):; n4lpv0uw pvotk $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatures do not vary drastically is/zp6ijdctuht tu2h+/w dh *;+ that

  It is a well-known fact that water has a higher spe7enow;w/f+ aaz ,fi/bcific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amount of heat, 30 calo7fewib;w/ zn/,aao f +ries, is added to each. Which statement is true?

  A thermally isolated system is made up of 1eoka 3de1lcw.w6ti :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 more13eo. ikalw1c wed6: t 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 zv4 it7opm:r2a)dh*pk0rb ) g a substance from the solid to the liquid state is referred tr))7dp mpt 4 kv2zo0ah ibg*:ro as the

  The heat required to change a p3zoi r. ei9.*f*uht nsubstance from the liquid to the vapor state is referred t.fe n *. i*iruph9toz3o as the

  If heat is added to a pure substance at a steady e6,1npktskv/;k+ jnk 1nc8 kt rate,

  When a solid melts

  When a liquid freezer(w6mfa9 y5op 5bgxj 8s

  When a liquid evaporad)mg) pwh)); g2p wfajtes

  When a vapor condensesk/c/r ni y :vofw:v4p+

  In a cloud formation, water vapor condenses invx bghsk.)s x 1*w 6-wfojx7e,to water droplets which get bigger and bigger until k.,7)wf *so-xvxwe xbhs6j1g it rains. This will cause the temperature of the air in the clouds to

  Turning up the flame under a pan of boiling water cww:cz83n*x se auses

  Equal masses of water .ignfuin v0 +96n bv5xat $20 \; ^{\circ}C$ 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 means of mo4l:3f evf+osi *ydjj0 nl8 1jg-g;hjolecular collisions is referred to af*o-0;v+:hilnjg4g d3y8jfjes o 1jls

  By what primary heat transfer mechanism does one end of an 8x v tdhn k,aczc/):x0e sg17hiron bar become hot when the0sz/1gah8dx7),k c hxc :tevn other end is placed in a flame?

  On a cold day, a piece of metal feels much colder to the touchi64eq 4jwg .v;poalo* than a piece of wood. This is due to the differevwo 6jge4q lpo*i4a;.nce in which one of the following physical property?

  If you double the thickness of a wall built from anelr -4f1efqa.+fi 4mf2 :lgu homogeneous material, the rate of heat loss f.efq iu2al ml 4-r14f:f f+genor a given temperature difference across the thickness will

  A layer of insulating material with thermal conductivity K is placed on a layei5,d mfh3 trm/r of another material of thertmmh/f 5 dir3,mal conductivity 2K. The layers have equal thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat flows by the mass movement ofxvhgtw- k232x. :wwu,yp ut)i molecules from one place to a 2.- 3htgty)xikxwv:w ,u up2wnother is referred to as

  By what primary heat t*6) cmakm +ft h1od,byransfer mechanism is a pot of water heated on a stove?

  Convection can occurg bd(xa:nv; d)er; 0ge

  Which of the following best expp 4nbk8h*pju+ lains why sweating is important to humans in maintaining suitable b*pbj uh8n p+4kody temperature?

  A spaceship is drifting in an environment where the acceleration of gy f.ndb5ofm1n; h2d2iravity is essentially zero. As the air on one side of the cabin is heated by an elect ndff2mn5o.i ybd h12;ric heater, what is true about the convection currents caused by this heating?

  Consider two neighboring recta u+qn),p,twlbngular 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 main tqn+ wlp,b,u)tain 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 factor does the rj6. *7aibzvcr +jy:xhadia. :jvh *+axyc zj7bri6ting power change?

  The process whereby heat flows in the absence of any medium is refe7q 1 oi4dig)kci a/x*hrred to as

  By what primary heat transferv3q sl:yr)9kl mechanism does the Sun warm the Earth?

  1700 J of work is equivalent to how much heat?x37ez lv, 8/zgr s9bj 4bmxg0y

  16.5 kcal of heat is 9h wd9k-qowa9)v wjm :rw8) f(fp/pymequivalent 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 temperature of 100di/hb-1 ix vth:qbe:1 r)qa r7 g of lead ($c = 0.11 \; kcal/kg \cdot ^{\circ}C$) by $15 \; ^{\circ}C$?

  If 40 kcal of heat is addede n8d8fra4 zi88p;xrwj bzo 8: to 2.0 kg of water, what is the resulting temperature ch8 bf rn p zxrz4j;o8i8w8d8ae:ange?

  A 4.0-kg aluminum block is originallc8i0 k ln,xl,bfp0g k+y at $10 \; ^{\circ}C$. If 160 kJ of heat is added to the block, what is its final temperature?

  150 kcal of heat raisrtg +s/r4y, 1jwjs2c les the temperature 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 baw,a/5k61f) snrfz ,hlaixm7:mi z t :hth water 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 iron and 0.16 kg of copper. How k 5aetsr1 v)hh,o*hx5 much heat is added to the gear if the temperas *ax5t1hrh,)v5ho ekture 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 metacs/vfrlp0lp75 h 0:m ol 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 copperzm x(pi6jeg5ma, r;jb ,)mj. i, 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 a;fp2grd3 +au3s ))gro.to g ;uuwv y8ht $100 \; ^{\circ}C$ 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 thermak4wfe zv3t 2:a 4b;qnylly isolated from its surroundings. One object has an initial temperw2y nqeakbt34vz4 ;f:ature 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 betweeq x. wa-gl-be8q *59gm(ghjda n various forms of energy by measuring the rise of temper .aambw jh*-eq98x -gdlqg (g5ature 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. sby*af67a9ly atw3/ gedlitt o3hv-ok9n9( a distance of 50 m. Assuming that all the gravitational energy is converted to thermal energy, by what temperature doesbw9ok7af9tt3(n-dl.9o a63sh/e ligyy*a t v the water rise?

  A 200-L electric water heater uses 2 kW)u vhs .fw4+kj,u9lu k. Assuming no heat loss, how long would it takuh.)94uuj, +k ks lvfwe to heat water 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 20 uq0gkgd 9tl1;kg of waterdg1;gu 0q9ktl from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mssl+ 3ae87f vkass 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 xcfs1,h ;ttp o4c4 gn6knife 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 to liquj/b pe59by0gk coj:ng -k2sd+id?

  Ice has a latent heat of fusion of 80 kcal/kg. How m,ufmk ghf,)j+bi z hht.(04kzuch heat is required to melt 20fhbiz,z kh g)humk,4+ j.0t(f 0 g of ice?

  How much heat energy is needed to chfxim.1 nvuw/(8m k5ao h( )lgsange 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs to be removed fro,fu(orcb bt xm)z6zpr; b91. gm 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ice is 80 kcal/kg. When 50 g of ice ; pj ;vs;li0uyat $0 \; ^{\circ}C$ is added to 50 g of water at $25 \; ^{\circ}C$, what is the final temperature?

  Eight grams of water b(*; yqcf1gp zinitially 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 atir7 9nq 7m;c,rabw-n8r0 q3ff7 qgg;g8p kmlh $0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is ne3abw0*2tt ub 5 8wcomseded to change 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to 3ja: qrb ndx/x j y8mw);aoi.)change one gram of $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required to change 100 gz9 sro- * w /qxlex79 zmjryo11e,4eod of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding ice to 1.8 4:wzbkzd: c n;ve9 +iskg 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 vapoiew 3da*--k idrization is 207 kcal/kg, ad-i3-i* eka wdnd 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 oz4 4 koli)-wy0u shk.ff 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 tqvgrc g9bg*j7e 88cpt k;2k-zwice that of brass. Two rods (one aluminum and the other brass) are joined together end to end in ekv-;prgk* ce 8z bj2t9g8gq7cxcellent 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 q0qcha, iip6- xx3:i /g(jkjndimensions of 3.0 m by 1.5 m. If the outside temciagkqp(,ij:0 xh -6 /ji nqx3perature 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. Iqvtxr7t,r, k 1:a sdb/3mwzv,f the outside tesk w 1zxa/:vdb, r3tqvr,t, m7mperature 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 through a 2.0iofht33t z- 3-nhw/tj m x 2.0 m section of concrete 3z /hwo thnft-it -3j3($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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,q9y/ a36m/gq ocaagri ,an.o3 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 heat is losp 8tg:il*/ux nt 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, the3f7wrmfn69l kk,ym0o temperature is monitored by measuring the radiant power emitted thro9 f3rm67w,n myl0fkko ugh 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 hum31ff s;a79i akz8 7gxxbt.,f;wvah wnan body 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 solubjdfu1* x0i(gou ,/ear 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.