Find the temperature of the lower surface of the pot, which is in contact with the stove. Express your answer in degrees.
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- A rock of mass 0.213 kg falls from rest from a height of 27.4 m into a pail containing 0.420 kg of water. The rock and water have the same initial temperature. The specific heat capacity of the rock is 1820 J/(kg C°). Ignore the heat absorbed by the pail itself, and determine the rise in temperature of the rock and water in Celsius degrees.A piece of metal with a mass of 5.05 g originally at 25.5°C is dropped into 25 g of water originally at 82.7°C. The final temperature of the metal and the water is 81.5°C. Determine the specific heat of the metal and consult Table 5.2 to determine its possible identity.Calculate the heat flow (H) into a refrigerator with a total outer surface area of 5.22m2, and given an outside temperature of 25°C and a fridge temperature of 8°C. The thickness of the walls of the fridge is 5.2 cm and they are insulated with polyurethane foam that has a thermal conductivity of 0.022 W/mk. 37.5W 55.3W 63.6W 77.2W
- A steel beam being used in the construction of a skyscraper has a length of 30.000 m when delivered on a cold day at a temperature of 13.000°F. What is the length of the beam when it is being installed later on a warm day when the temperature is 87.000°F? (Give your answer to at least five significant figures.)A wood stove is used to heat a single room. The stove is cylindrical in shape, with a diameter of 40.0 cm and a length of 55.0 cm, and operates at a temperature of 410°F. (o = 5.6696 x 108 w/m2 . K, 1 Btu = 1054 J.) (a) If the temperature of the room is 70.0°F, determine the amount of radiant energy delivered to the room by the stove each second if the emissivity is 0.950. (b) If the room is a square with walls that are 8.00 ft high and 30.0 ft wide, determine the R-value needed in the walls and ceiling to maintain the inside temperature at 70.0°F if the outside temperature is 32.0°F. Note that we are ignoring any heat conveyed by the stove via convection and any energy lost through the walls (and windows!) via convection or radiation. ft2. oF . h/Btu