3.Liquid oxygen has a temperature of–189C. What is this temperature in kelvins?4.The temperature of an oxygen tank is at 279 K, and the temperature of a nitrogen tank is 15C. How muchgreater is the temperature of the nitrogen tank? (Express the answer in kelvins.)5.The body temperature of a certain human being is 98.27F. What does this temperature equal in kelvins?6.A falling stone with a mass of 0.398 kg strikes the ground. Assuming that the stone is initially at rest when itbegins falling, how high must the stone be above the ground for the internal energy of the stone and ground toincrease by 1670 J? (g= 9.81 m/s)7.A hammer drives a nail at a speed of 0.42 m/s into a piece of wood. The wood does not move during thisaction. If the mass of the nail is 78.2 g and half of its mechanical energy is transferred to the wood as heat,how much does the internal energy of the wood change?8.What is the increase in the internal energy per kilogram of water at the bottom of a 115 m waterfall, assumingthat all of the initial potential energy is transferred as heat to the water? (g= 9.81 m/s)9. A 3.4910kg lead bullet travels at a speed of 2.5210m/s and hits a wooden post. If half the totalinternal energy remains with the bullet, and it takes 1.3010J of energy to raise the temperature of akilogram of lead by 1.00C, what is the increase in temperature of the embedded bullet?10. A 5.2310kg object is attached by a rope through a pulley to a paddle-wheel shaft that is placed in awell-insulated tank holding 25.3 kg of water. The object is allowed to fall, causing the paddle wheel to rotate,churning the water. Assume the object falls a vertical distance of 1.2310m at constant speed, that all ofthe change in internal energy is conveyed to the water, and that it takes 4186 J to raise the temperature of eachkilogram of water by 1.00C. What is the temperature change of the water? (g= 9.81 m/s)11.A 0.29 kg aluminum plate slides down a 16 m long surface that is inclined at a 30.0angle to the horizontal.The force of kinetic friction exactly balances the component of gravity down the plane so that the plate, oncestarted, glides down at constant velocity. If 82.2 percent of the mechanical energy of the system is absorbedby the aluminum, and it takes 9.0010J to raise the temperature of a kilogram of aluminum 1.00C, what isthe temperature increase of the plate when it is at the bottom of the incline? (g= 9.81 m/s)12.What is the temperature increase of 6.4 kg of water when it is heated by aW immersion heater forexactly 18.8 min? (cp= 4186 J/kgC)13.An electric drill bores through a 0.111 kg piece of copper in 22.9 s. Find the increase in the temperature of thecopper if the drill operates at 50.8 W. Assume that the drill does not increase in temperature. (c= 387J/kg°C)

14.Find the final equilibrium temperature when 15.0 g of milk at 13.0C is added to 1.4810g of coffee witha temperature of 88.3C. Assume the specific heats of coffee and milk are the same as for water (c= 4.19J/gC), and disregard the heat capacity of the container.

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