Which of the following is the smallest unit of heat e(qi9d 04kid (u.eg.nq+krbm ze k*u.s nergy?

  The amount of heat necessary to raise the temperalku0e.he 1pcb ) 9h ejkmh.mgt s60p:6ture of 1 gram of water by $1 \; ^{\circ}C$ is referred to as the

  The measure of the averahtz)q e .i*:yage kinetic energy of individual molecules is referred to a .*aqyt)hz:e is

  A cup of water is scooped up from a swimming pool oe.x 4 fs*oqev/9mep,dz j: rp.f water. Compare the temperature T and the internal energy U of t/,x:v 9rp emo4jp.*szdeq f. ehe water, in both the cup and the swimming pool.

  The internal energy of an ideal gas yv +zq* b85pcidepends on

  An ideal gas at STP is first comprev3*.zidfp 9h;bzhw4b ssed until its volume 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 while holding the temperature con.pdfw b 4hbz h*93zvi;stant. If the initial internal energy of the gas is U, the final internal energy of the gas will be

  An ideal gas with insev km v+ xgcg (-wnvbi6*np;)f 1vx06ternal energy U at $200 \; ^{\circ}C$ is heated to $400 \; ^{\circ}C$. Its internal energy then will be

  The reason ocean temperatuc/ q2 g/w0mnplres do not vary drastically is that

  It is a well-known fact that water has a highenf 9qnn/pa wtdt84ul(,.(mys r 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,nld8q n tw. (49p(fmysnau/t each. Which statement is true?

  A thermally isolated system is made up of a hot piece of al .ij;:xn(nzdxvb 0l+yuminum and a cold piece of copper; the aluminum and the copper are in thermal contact. The specific heat capacity of a:i(+.nx nx0 dv ybz;ljluminum 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 o / e7mcdpua7-solid to the liquid state is referred to aao/ e7dpmu c7-s the

  The heat required to change a substance k5 g. -a3 l)e 8hyigtzeamz-h9from the liquid to the vapor state is referred t935.-8g)mh at-ah zy lzee kigo as the

  If heat is added to a pure lvf gm+(w+1r0xaq( 3j r hg4iusubstance at a steady rate,

  When a solid melts

  When a liquid freeze0cq amju-xbu wk( 4)*f:x5 gxgs

  When a liquid evaporate p*cg.fi,m )6wph*z :kcp:dles

  When a vapor condensez6h nvj 0nyh1*s

  In a cloud formation, water vapor condenses into water drg4pff1; nj:* hf-g apioplets which get bigger and bigger until it rains. This wip1fip* 4h;:fgafn g-jll cause the temperature of the air in the clouds to

  Turning up the flame under1kyoauuy:4g,1dk z4 (c tvwi2 a pan of boiling water causes

  Equal masses of water at 3 j-lpp)c6n67crwq,b d ihl1a $20 \; ^{\circ}C$ 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)sumyoa *uvfw 2 o,k6ri6e5 k1 by means of molecular collisions is referred to asmoi*r1,u6v62 uoy fkas we)5k

  By what primary heat traw(3 tmr ms,.fhs3 dm+onsfer mechanism does one end of an iron bar become hot when the s fd(wh.+,r33omtmsm other end is placed in a flame?

  On a cold day, a piece of metal feels mu,.kaf37 iutftd8ys. zch colder to the touch than a piece of wood. This is due to the difference in which on8ziftat .3k7,sy .udf e of the following physical property?

  If you double the thickness of a wall built from a f0 w7nixt qf1pb1j56 hhomogeneous material, the rate of heat loss for a given temperaturehn 01 f j6xqbpfi15t7w difference across the thickness will

  A layer of insulating material with csi-fb t.m;v,d ,m8csthermal conductivity K is placed on a layer of another material of thermal conductivity 2K. The layers have equicds,- ;tmsvbc8, m.fal thickness. What is the effective thermal conductivity of the composite sheet?

  The process whereby heat flows by the mass movement of molecules from one px j*v).fkyxl0lace to another is ref.v ylj)kxx0*ferred to as

  By what primary heat trans40a f *c( :xv 21(qbhrz+n;itqehit jnfer mechanism is a pot of water heated on a stove?

  Convection can occuryo)6z8,6n 4uui l msrm

  Which of the following best explain9) pkuw62y wf5-m/ rrdfjgn n3* keyq/s why sweating is important to humans in maintaining su /9f3ury*n5-/jwm 2 kkrnpgwfqd y6) eitable body temperature?

  A spaceship is drifting i+y0 d(w)hf bhhf) ja3h kps*2jn an environment where the acceleration of gravity is essentially zero. As the air on one side of the cabin is heated by an electric heater, what is true about the convection currents caused )p)0h+j hhywfjhf(*d a2s3bkby this heating?

  Consider two neighboring rectangular housescolu, yvw1p )t0(* kc9zz6fnf 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 maintaik,f0cc t6)o9 yfv1*l(zzpwun n 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 ils gy0z3 ,qg;h3sxea0wi,3va, rc8vzs doubled, by what factor does the radiating power changeicargz3w; gv3s 03la,ez, qx8y 0,hs v?

  The process whereby heat flows in the a13bswx0/t y, vbzi f22vr(ehnco(y *cbsence of any medium is referred to as

  By what primary heat transfer mechanism does the Sun walnjt/ t7(ck rthmxt3a 51ze(; ippp9: rm the Earth?

  1700 J of work is equivalent t c:yd,.;ju wnwo how much heat?

  16.5 kcal of heat is equivalent to how mujogv((5f j+u:t*r ok/ v1cizhch 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 need+* ie :j. tn7.nbxyykjed to 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 2.0iw5- cao 6ue;y-m-dx q kg of water, what is the resulting temperature ceuym -x -i6qc5o; wa-dhange?

  A 4.0-kg aluminum block is origin3o jxyk08 bk+ (w8):rlhrrsjdally 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 yb q5eq6*cbg.y: xw, ifuf7 p3kg of material by $400 ^{\circ}F$. What is the material's specific heat capacity?

  A person tries to heat up her bath water by addajcl(/v b8ux-a /34yj-xeffyh *fye4ing 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 q4z 3 /n5jglphof 0.10 kg of iron and 0.16 kg of copper. How much heat is agjq3 n4lh /zp5dded to the gear 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 metal isffxshc, (-*x 7vh yd*e 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,zizt82c6 rj myjf fa 38cm-5/g tq.nk; 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 a9 ajx.gsbpq o.8 aub3)1 ib-bgt $100 \; ^{\circ}C$ 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 thermm /it r,m v:ruep2skstao d-j787: ;lsally isolated from its surroun/akts utr pj:d 2s, l8mr7-vmie7:os; 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 explore the relationshipsf,; hh c4boj kwit;-n) between various forms of energy by measuring the 4hh-fwnk;cb)ji o t;,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 distanj-k x 0gk+ocw4ce of 50 m. Assuming that all the gravitational energy is convertjo-g c0k4wkx+ed to thermal energy, by what temperature does the water rise?

  A 200-L electric water heater uses 2 kW. Assuming nbbb+k./ j .aiwo heat loss, how long would it tbb .+jbka .i/wake 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 t 3w4 zn-v9w0nzva. 1 xsqk8.lk;kfkb.cpx l3n ake to heat 20 kg of waterk.spn3.k. n q ln x4w8vazwz9-1lkvc;30xkbf from $20 \; ^{\circ}C$ to $100 \; ^{\circ}C$?

  An aluminum kettle (mass 100pi4j8-h ua-8n c+5w*pk namzu0 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 (specif3 u )mrry 1romj1o0xi(ic 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 b3d- 27x fjmsive removed from steam to change it to liquid?

  Ice has a latent heat of fusion of 80 kcal/kg. H:g-q)*rc67 isz 5j3kbq l8if gok-ffwow much heat is required to melt 200 g of icl7)jcf-gsz: -ki6f83bf*q g5kqr o wie?

  How much heat energy is needed to*g8 u3 pt8n :lyp11lve8eao fw change 10 kg of ice at $-20 \; ^{\circ}C$ to water at $50 \; ^{\circ}C$?

  How much heat needs jwgf c*gl 8g1ervm ,-1to be removed from 100 g of $85 \; ^{\circ}C$ water to make $-5 \; ^{\circ}C$ ice?

  The heat of fusion of ic .n4/p0e a6nvxq5esls e 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 initially atlv p g0j+ scukc(lec912cn,g5 $100 \; ^{\circ}C$ 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 jr g4kf y9.-b-xwln;n$0 \; ^{\circ}C$ is to be vaporized, how much heat must be added?

  How much heat energy is needed to change 10 kg of water j jr jy/tl/9w04the 1xat $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?

  How much heat is required to change one gram j3u3j f249fw t9xw1rj pxpfqljt0 . +jof $0 \; ^{\circ}C$ ice to $120 \; ^{\circ}C$ steam?

  How much heat is required to change 100 d9ebg4-afatvlu)od( +g40 sgj* 2iq jg of $-10 \; ^{\circ}C$ ice to $150 \; ^{\circ}C$ steam?

  A person makes ice tea by adding ice to 1.8 kg w o 9fr2vfj0c(qkz/l 0of 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 vap8 ji 0vwn)01lp 4 tw1tyfe4l tugrc)l1orization is 207 kcal/kg, and its melting point ijl c4evt0f1)4i wtpn11g utr8y l)wl0s $328 \; ^{\circ}C$. 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 concrete isvnrbc,16me-y j w++ c-;faug es+z0xa $0.8 \; W/m \cdot ^{\circ}C$ 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 (one aldr)ctr v;m cd;l-24y cuminum 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 cr;yvc)2mrd;c4 l-td 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 3.0 m by 1vs+(ht ;/j7ood4pm /y* oup lu.5 m. If the outside temperature so uujh(p7/yvmt oo4d;pl*/ + 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 mpkh0)af d89t l kj,;a z08aabo by 1.5 m. If the outside tempj8lahkpb a t8z)0 ,ad0 9oa;fkerature 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 2.0 m x 2.0 m secw ,d 4k757makdz j6sfj4dv6z stion of concrete vd,w z 77as4dz 4d56fsmkjkj6($k = 2.0 \times 10^{-4} \; kcal/s \cdot m \cdot ^{\circ}C$) 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 xviym p1wj2;0 ujw)e6transfer 1,000,000 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 lostgyzt 1e6j so.8 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 temperature is monitored4gl)/*ol*jll ykcjz8 d:ef s ; by measuringof/l:clkd)*4lj8 y l*zje gs; 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 it i) kr8w8f4 g hx6;4hqdlxajb(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 injl 5z88so g3r2ak 7hzqside 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.