A pig consumes 6000 kcal of food in one day, converting most of it to thermal energy to maintain body temperature. If it loses 30% this energy by evaporating water (through breathing and sweating ), how many kilograms of water evaporate
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- At 25.0 m below the surface of the sea, where the temperature is 5.00C, a diver exhales an air bubble having a volume of 1.00 cm3. If the surface temperature of the sea is 20.0C, what is the volume of the bubble just before it breaks the surface?One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.).A 70Kg runner loses 0.5kg of water each hour through evaporation of perspiration in order to maintain a stable temperature. The latent heat of water at his skin temperature is 2440kJ/kg and the average specific heat of his body is 3.5kJ/kg*K. If he stopped perspiring, how much would his temperature rise in the following 30 minutes?
- The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 10-4 kW/m · °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 25.9°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. m3 A house has a rectangular base and a roof that peaks along a line above the center of the house and parallel to the length of the house. This roof slopes downward from the peak to each edge at an angle of 37.0° with the horizontal. The length of the front of the house is 10.0 meters. The width of the house is 8.00 meters. The height from the front of the house up to the edge of the roof is 5.00 meters.The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their average thickness is 21.4 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 24.0°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. 34.68 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. m3 137.00 5.00 m 00 8.00 m 10.0 mFollowing vigorous exercise, the body temperature of an77-kg person is 42 degrees celcius. At what rate in watts must the person transfer thermal energy to reduce the body temperature to in 36 degress celcius in 30 min, assuming the body continues to produce energy at the rate of132 W?
- What is the ratio of the energy required to warm 125 g of Ice (0.0 \deg C) to body temperature (37 \deg C) to warming the same amount of water through the same temperature change? Answer format is the number Eice/Ewater = (2 significant figures) Latent Heat of Fusion of Water: 335, 000 J/kg Specific Heat Capacity of Water: 4186 J/kg/\deg CA mass of ice at -4°C is needed to cool 115 kg of vegetables in a bunker for 24 hours. The initial temperature of the vegetables is assumed to be 29°C. It is also assumed that, within the 24-hr period, the average temperature inside the bunker is 7°C. If the heat gained per hour in the bunker is 30% of the heat removed to cool the vegetables from 29°C to 7°C, what would be the required mass of ice in kg? Use: Specific heat of water 4.2292 kJ/kg-°C Specific heat of ice 1.9387 kJ/kg °C Specific heat of vegetables 3.35 kJ/kg-°CThe average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 27.3°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. m3 37.0 5.00 m 8.00 m 10.0 m
- -1 Heat capacity of ice: 2090 J kg-¹ °C-1 Heat capacity of water (liquid): 4186 J kg-¹ °C-1 Latent heat of fusion: 3.36×105 J kg-¹ -1 Latent heat of vaporization: 2.26×107 J kg -1 Give your answers to at least three significant figures. Your answers must be accurate to 1%. How much heat energy is required to raise the temperature of 625 g of ice from a temperature of -50 °C to a temperature of -27 °C? J Submit Answer How much heat energy is required to raise the temperature of 625 g of water from a temperature of 43 °C to a temperature of 87 °C? J Submit Answer How much heat energy is required to raise the temperature of 625 g of water (initially ice) from a temperature of -50 °C to a temperature of 87 °C? J Submit Answer How much heat energy is required to evaporate 625 g of water which is initially at a temperature of 43 °C? JA 755-g sample of water is heated from 5.50°C to 98.40 °C. Calculate the amount of heat absorbed (in kilojoules) by the water. Specific heat of water = 4.184 J/g-°C . Your answer must be 4 sig figure and in kJA brass calorimeter cup with a specific heat of 380 J/(kg * C) contains olive oil with a specific heat of 1,970 J/(kg*C) at 32.0 Celsius. The combination is heated uniformly so that the temperature changes by 2.10 Celsius per minute. If the cup has a mass of 300 g and contains 900 g of the liquid, determine the rate at which heat energy is added (in W).