On a hot day, the temperature of an 80,000-L swimming pool increases by 1.50C. What is the net heat transfer during this heating? Ignore any complications, such as loss of water by evaporation.

A glass coffee pot has a circular bottom with a 9.00-cm diameter in contact with a heating element that keeps the coffee warm with a continuous heat transfer rate of 50.0 W(a) What is the temperature of the bottom of the pot, if it is 3.00 mm thick and the inside temperature is 60.0ºC ?(b) If the temperature of the coffee remains constant and all of the heat transfer is removed by evaporation, how many grams per minute evaporate? Take the heat of vaporization to be 2340 kJ/kg.

You are heating 310 mL of water to make tea; however, you forget the pot on the stove, and all of the water boils away. All of the steam quickly condenses onto the plastic shelf that hangs above the stove. The shelf is initially at 20°C, and heats uniformly to 33°C after all the steam condenses into water on it. The specific heat of water is 4190 J/kg K and that of plastic is 1670 J/kg K. The latent heat of fusion of water is 3.33×105 J/kg and the heat of vaporization of water is 22.6x105 J/kg. The density of water is 1000 kg/m3, and 1 mL = 10-6 m³. Your kitchen is at sea level. What is the mass of the shelf? Assume that no energy is lost to the environment.

A sphere of surface area 1.25 m² and emissivity 1.0 is at a temperature of 100°C. At what rate does it radiate heat into empty space? (o = 5.67 × 10-8 W/m2.K4) O 3.7 W O 0.71 mW O 1.4 kW O 7.1 W O 9.9 mW

Many species cool themselves by sweating, because as the sweat evaporates, heat is transferred to the surroundings. A human exercising strenuously has an evaporative heat loss rate of about 659 W. If a person exercises strenuously for 21.9 min, how much water must he drink to replenish his fluid loss? The heat of vaporization of water is 2430 J/g at normal skin temperature.

On a hot day, the temperature of an 80,000-L swimming pool increases by 1.50ºC . What is the net heat transfer during this heating? Ignore any complications, such as loss of water by evaporation.

You want to use an electric stove to heat some water. You place a pot filled with 1500 g of water at room temperature (25 °C) on the stove (the charaterisitics of the pot can be neglected). In order to heat the water faster, you also use an electric beater, which does 120 J of work per second. After 9 minutes the water starts boiling (100 °C). Specific heat capacity of water is 4.2 J/(g*°C). By how much has the energy of the surroundings changed?

A block of 10.0 kg of solid gold at its melting point of 1,063.00°C changes phase to liquid gold at 1,063.00°C and then changes phase back to solid gold at 1,063.00°C. The latent heat of fusion for gold is 6.44×104 J/kg. What is the total change in internal energy of the gold during this whole process?

. At what net rate does heat radiate from a 250- m² black roof on a night when the roof's temperature is 30°C and the surrounding temperature is 15°C? The emissivity of the roof is 0.900. The Stefan- Boltzmann's constant is σ =5.67 × 10−8 J/(s m² K4). Hint: The roof radiates heat to the surroundings but also absorbs heat from the surroundings. Use the sign convention for heat leaving and entering a system. Pnet =Q/t= 4.44 x10³× W ! No, that's not the correct answer.

A 200-g aluminum cup contains 800 g of water in thermal equilibrium with the cup at 80°C. The combination of cup and water is cooled uniformly so that the temperature decreases by 1.5°C per minute. At what rate is energy being removed? Express your answer in watts.