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4. The air in a 100 m3 balloon is electrically heated from 10 C to 35...
QUESTION 7 A 4m X 5m X 6m room is to be heated by a baseboard...
QUESTION 7 A 4m X 5m X 6m room is to be heated by a baseboard resistance heater. It is desired that the resistance heater be able to raise the air temperature in the room from 7 to 23°C within 15 min. Assuming no heat losses from the room and an atmospheric pressure of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature. Use R= 0.278 kJ/kg.K Cp=1.005 kJkgk Cv 0.718 kJ/kg.K...
An insulated 1.7 m3 rigid tank contains air at 500 kPa and 50oC. A valve connected...
An insulated 1.7 m3 rigid tank contains air at 500 kPa and 50oC. A valve connected to the tank is now opened and air is allowed to escape until the pressure inside drops to 200 kPa. The air temperature during this process is maintained constant by an electric resistance heater placed in the tank. a. Determine the mass of air initially, m1 in kg. b. How much air escaped from the tank, mout in kg. c. Determine the electrical work...
A flat plate test section, designed for a boundary-layer measurement experiment, is 0.5 m wide an...
A flat plate test section, designed for a boundary-layer
measurement experiment, is 0.5 m wide and has an electrically
heated surface installed 0.5 m away from the leading edge (see
figure below). The electrically heated strip is 10 cm long and 5mm
deep. It is insulated at its bottom surface as well as both
wide-end edges. If the surface of this electrical heater strip is
to be maintained at a uniform temperature of 120°C when the
atmospheric pressure air at...
La resistance heater will heat a room (5m x 5m x 6m in size) within 10...
La resistance heater will heat a room (5m x 5m x 6m in size) within 10 minutes and raise the air temperature from 10°C to 28°C. Assuming no heat losses from the room and an atmospheric temperature of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature.
A workshop with well-insulated walls and containing 700 m3 of air at 275 K is heated...
A workshop with well-insulated walls and containing 700 m3 of air at 275 K is heated at constant pressure (atmospheric). Consider air to be an ideal diatomic gas (a) Determine the energy (in k)) required to increase the temperature of the air in the building by 1.10°C. kl (b) Determine the mass (in kg) this amount of energy could lift through a height 2.30 m
Q4 04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tub...
Q4
04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady op eration all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of...
A small balloon of the volume 2 × 10−3 m3 is filled with the helium gas...
A small balloon of the volume 2 × 10−3 m3 is filled with the helium gas at atmospheric pressure p = 100 kPa and a temperature 15◦C. Once we release the balloon it rises rapidly to an altitude at which the atmospheric pressure drops by 5 %. At that point the balloon breaks. Consider that the process is adiabatic.
Please be as detailed as you can be ! La resistance heater will heat a room...
Please be as detailed as you
can be !
La resistance heater will heat a room (5m x 5m x 6m in size) within 10 minutes and raise the air temperature from 10°C to 28°C. Assuming no heat losses from the room and an atmospheric temperature of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature.
b. A hot air balloon has a volume of 2000 m3 when fully inflated, and the...
b. A hot air balloon has a volume of 2000 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure because of the large opening used to fill the balloon and heat the air inside it. What's the mass of hot air inside the balloon if its temperature is 120°C? (Assume a molecular weight of 28.8 g/mole for air.) 1790 kg 5850 kg 62.0 kg 203 kg
Water is to be heated from 10 °C to 83 °C as it flows through a...
Water is to be heated from 10 °C to 83 °C as it flows through a 0.015 m-internal-diameter, 13-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. The system provides hot water at a rate of 5 L/min Assumelp...
QUESTION 7 A 4m X 5m X 6m room is to be heated by a baseboard resistance heater. It is desired that the resistance heater be able to raise the air temperature in the room from 7 to 23°C within 15 min. Assuming no heat losses from the room and an atmospheric pressure of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature. Use R= 0.278 kJ/kg.K Cp=1.005 kJkgk Cv 0.718 kJ/kg.K...
A flat plate test section, designed for a boundary-layer
measurement experiment, is 0.5 m wide and has an electrically
heated surface installed 0.5 m away from the leading edge (see
figure below). The electrically heated strip is 10 cm long and 5mm
deep. It is insulated at its bottom surface as well as both
wide-end edges. If the surface of this electrical heater strip is
to be maintained at a uniform temperature of 120°C when the
atmospheric pressure air at...
La resistance heater will heat a room (5m x 5m x 6m in size) within 10 minutes and raise the air temperature from 10°C to 28°C. Assuming no heat losses from the room and an atmospheric temperature of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature.
A workshop with well-insulated walls and containing 700 m3 of air at 275 K is heated at constant pressure (atmospheric). Consider air to be an ideal diatomic gas (a) Determine the energy (in k)) required to increase the temperature of the air in the building by 1.10°C. kl (b) Determine the mass (in kg) this amount of energy could lift through a height 2.30 m
Q4
04(12%) Water is to be heated from 10°C to 80°C as it flows through a 2-cm-internal-diameter, 7-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady op eration all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of...
Please be as detailed as you
can be !
La resistance heater will heat a room (5m x 5m x 6m in size) within 10 minutes and raise the air temperature from 10°C to 28°C. Assuming no heat losses from the room and an atmospheric temperature of 100 kPa, determine the required power of the resistance heater. Assume constant specific heats at room temperature.
b. A hot air balloon has a volume of 2000 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure because of the large opening used to fill the balloon and heat the air inside it. What's the mass of hot air inside the balloon if its temperature is 120°C? (Assume a molecular weight of 28.8 g/mole for air.) 1790 kg 5850 kg 62.0 kg 203 kg
Water is to be heated from 10 °C to 83 °C as it flows through a 0.015 m-internal-diameter, 13-m-long tube. The tube is equipped with an electric resistance heater, which provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. The system provides hot water at a rate of 5 L/min Assumelp...
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