On a certain dry sunny day, a swimming pool’s temperature would rise by 2.465ºC if not...
On a certain dry sunny day, a swimming pool’s temperature would rise by 2.465ºC if not for evaporation. What percent of the water must evaporate to carry away precisely enough energy to keep the temperature constant? Specific heat of water is 1.00 kcal/kgºC and the heat of vaporization is 580 kcal/kg.
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On a certain dry sunny day, a swimming pool’s temperature would
rise by 2.465ºC if not...
Heat transfer is required to raise the temperature of a 0.699 kg aluminum pot containing 2.77...
Heat transfer is required to raise the temperature of a 0.699 kg aluminum pot containing 2.77 kg of water from 32.5ºC to the boiling point and then boil away 0.695 kg of water. If the rate of heat transfer is 292 W, how long does this process take? Aluminum's specific heat is 0.215 kcal/kgºC; Water's specific heat is 1.00 kcal/kgºC; and heat of vaporization for water is 539 kcal/kg.
38. BIO The rate at which a resting person converts food energy is called one's basal...
38. BIO The rate at which a resting person converts food energy is called one's basal metabolic rate (BMR). Assume that the resulting internal energy leaves a person's body by radiation and convection of dry air. When you jog, most of the food energy you burn above your BMR becomes internal energy that would raise your body temperature if it were not eliminated. Assume that evaporation of perspiration is the mechanism for eliminating this energy. Suppose a person is jogging...
On a hot day, the temperature of a 33,000 L swimming pool increases by 1.70°C. What...
On a hot day, the temperature of a 33,000 L swimming pool increases by 1.70°C. What is the net heat transfer (in J) during this heating? Ignore any complications, such as loss of water by evaporation. (Enter the magnitude.)
On a hot day, the temperature of an 82893-L swimming pool increases by 1.6°C. What is...
On a hot day, the temperature of an 82893-L swimming pool increases by 1.6°C. What is the net heat transfer during this heating? Ignore any complications, such as loss of water by evaporation. Submit answer Answers Answer Score
3) A home requires 62 kWh of energy (heat) on a winter day to maintain a constant indoor temperat...
3) A home requires 62 kWh of energy (heat) on a winter day to maintain a constant indoor temperature of 20 °C. (a) How much collector surface area does it need for an all-solar thermal heating system that has an absorptivity of 0.2? The average solar radiation in winter is about 6.5 kWh/m2/day. [35 points] a) What is the mass of water required if this energy is stored as sensible heat energy storage system? Where the water operates between 20...
In a certain solar house, energy from the Sun is stored in barrels filled with water....
In a certain solar house, energy from the Sun is stored in barrels filled with water. In a particular winter stretch of five cloudy days, 1.34 × 106 kcal is needed to maintain the inside of the house at 22.3oC. Assuming that the water in the barrels is at 42.2oC and that the water has a density of 1.00 × 103 kg/m3, what volume of water is required? Take the specific heat of water to be 1.00 kcal/kg.
Calculate by the energy balance method the evaporation rate in [mm day] from an open water surface, if the net radiation is 225[Wrm] and the air temperature 22°C, assuming no sensible heat or ground...
Calculate by the energy balance method the evaporation rate in [mm day] from an open water surface, if the net radiation is 225[Wrm] and the air temperature 22°C, assuming no sensible heat or ground heat flux, the water density is 997 kg/m, and the latent heat Jkgl2.501x10-2370T where Temperature T is in [C]. Is your estimation reasonable in reality? [15pt]
Calculate by the energy balance method the evaporation rate in [mm day] from an open water surface, if the net...
please answer all questions Temperature Change and Phase Change - Specific Heat and Latent Heat -...
please answer all questions
Temperature Change and Phase Change - Specific Heat and Latent Heat - From COLD ICE to Warm Water The quantitative relationship between heat transfer and temperature change is Q = mcAT, where Q is heat transfer, m is the mass of the substance, and AT is the change in temperature. The symbol c stands for specific heat which depends on the material and phase (for exmample, water and ice have different specific heat). The specific heat...
QUESTION 8 How does the internal energy of the ice and water mixture change if the...
QUESTION 8 How does the internal energy of the ice and water mixture change if the temperature does not rise while the ice is melting? It decreases, because you need to use energy to make a freezer run, but ice melts spontaneously. No enough information to determine. It increases, because it takes more energy for water molecules to be disordered than to be ordered. It remains the same, because both are at the same temperature. QUESTION 9 Suppose you start...
On a summer day, the air temperature is 36°C and the relative humidity is 20%. Water...
On a summer day, the air temperature is 36°C and the relative humidity is 20%. Water evaporates from the surface of a lake at a rate of 0.20 kg/h per square metre of water surface area. The temperature of water is 25°C. (a) Determine the mass transfer coefficient. (10 marks) (b) Determine the convective heat transfer coefficient. (10 marks) (c) Determine the net heat loss (in W/m2) from the lake. (5 marks) The specific volume of water vapour at 25°C...
38. BIO The rate at which a resting person converts food energy is called one's basal metabolic rate (BMR). Assume that the resulting internal energy leaves a person's body by radiation and convection of dry air. When you jog, most of the food energy you burn above your BMR becomes internal energy that would raise your body temperature if it were not eliminated. Assume that evaporation of perspiration is the mechanism for eliminating this energy. Suppose a person is jogging...
On a hot day, the temperature of an 82893-L swimming pool increases by 1.6°C. What is the net heat transfer during this heating? Ignore any complications, such as loss of water by evaporation. Submit answer Answers Answer Score
3) A home requires 62 kWh of energy (heat) on a winter day to maintain a constant indoor temperature of 20 °C. (a) How much collector surface area does it need for an all-solar thermal heating system that has an absorptivity of 0.2? The average solar radiation in winter is about 6.5 kWh/m2/day. [35 points] a) What is the mass of water required if this energy is stored as sensible heat energy storage system? Where the water operates between 20...
Calculate by the energy balance method the evaporation rate in [mm day] from an open water surface, if the net radiation is 225[Wrm] and the air temperature 22°C, assuming no sensible heat or ground heat flux, the water density is 997 kg/m, and the latent heat Jkgl2.501x10-2370T where Temperature T is in [C]. Is your estimation reasonable in reality? [15pt]
Calculate by the energy balance method the evaporation rate in [mm day] from an open water surface, if the net...
please answer all questions
Temperature Change and Phase Change - Specific Heat and Latent Heat - From COLD ICE to Warm Water The quantitative relationship between heat transfer and temperature change is Q = mcAT, where Q is heat transfer, m is the mass of the substance, and AT is the change in temperature. The symbol c stands for specific heat which depends on the material and phase (for exmample, water and ice have different specific heat). The specific heat...
QUESTION 8 How does the internal energy of the ice and water mixture change if the temperature does not rise while the ice is melting? It decreases, because you need to use energy to make a freezer run, but ice melts spontaneously. No enough information to determine. It increases, because it takes more energy for water molecules to be disordered than to be ordered. It remains the same, because both are at the same temperature. QUESTION 9 Suppose you start...
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