The dimensions of ice box cooler are 40 x 40 x 40 cm. Each wall is...
The dimensions of ice box cooler are 40 x 40 x 40 cm. Each wall is 4.5 cm thick and is made of plastic. If outside temperature is 24 0 C and icebox maintains interior temperature is 00 C . Thermal conductivity of plastic, k = 0.032 W/(K. m).. How much ice melts in 2 hours?
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The dimensions of ice box cooler are 40 x 40 x 40 cm. Each wall
is...
A Styrofoam cooler has a surface area of 2,700 cm2 and a wall thickness of 3.00...
A Styrofoam cooler has a surface area of 2,700 cm2 and a wall thickness of 3.00 cm. Styrofoam has a coefficient of thermal conductivity of 0.010 W/m °C. A 2.00 kg block of ice is placed inside the cooler that has a temperature inside of 2°C. When the temperature outside is 30.0°C, the ice lasts for 8.00 hours. If the temperature outside becomes 20.0°C, then how long will the ice last?
A cooler is a closed container in the shape of a cube, each side 0.5 m...
A cooler is a closed container in the shape of a cube, each side 0.5 m in length, and made of polystyrene foam with a thermal conductivity k = 0.010 W /m K. The foam is 5 millimeters thick on all sides. The cooler contains 40 kg of ice and the inside temperature is a constant 0◦C. If the temperature outside the cooler is a constant 25◦C, calculate the power P and the total energy Q conducted through the cooler...
Ice crates with the following dimensions: length = 30 cm, width = 40 cm, and height...
Ice crates with the following dimensions: length = 30 cm, width = 40 cm, and height = 30 cm, made of 3 cm thick insulation material (k = 0.033 W / [m ° C]). Inside the crate is filled with 10 kg of ice at 0 ° C. The inner surface temperature of the ice cube is assumed to be constant at 0 ° C. The latent heat of the ice melting is 333.2 kJ / kg. The outer surface...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house is made of glass windows. The wall is 15 cm thick and has an average thermal conductivity of 0.8 W/m K. The window glass is 8 mm thick and has an average thermal conductivity of 0.15 W/m K. On a winter day the inside temperature of the wall and the glass is 20°C, and the outside air temperature is -10°C. The outside convection heat...
The wall of a house is 3 m high, 10 m long and 30 cm thick;...
The wall of a house is 3 m high, 10 m long and 30 cm thick; it has an effective thermal conductivity of 10 W/m K. The outer surface of the wall has an emissivity of 0.75. On a winter night, the outer surface of this wall is at a temperature of 0 °C and the air is at a temperature of –10 °C. The heat transfer coefficient for the outside wall is 8 W/m2 K. The outside wall also...
A concrete wall of a house is 45 cm thick and has a surface area 20m...
A concrete wall of a house is 45 cm thick and has a surface area 20m x 5 m. The inside temperature of the wall is 47 °C and the outside air temperature is 14 °C. Thermal conductivity of the concrete wall is 0.8 W/mK. Calculate the heat transfer rate through the wall by conduction and its thermal resistance.
An ice chest 50 cm long by 40 cm wide by 30 cm high comprised of...
An ice chest 50 cm long by 40 cm wide by 30 cm high comprised of 3 cm thick Styrofoam having thermal conductivity k = 0.033 W/m°C is filled with ah ice/ water mixture containing 45 kg of ice. The ice / water mixture is separated from the lid by 1 cm of air. The temperature of the surrounding air and the surface on which the ice chest is resting is 30° C, The temperature of the inner surface of...
Question 1: Your bear cooler is made of 20-mm-thick polystyrene (k = 0.021 W/m.K) and has...
Question 1: Your bear cooler is made of 20-mm-thick polystyrene (k = 0.021 W/m.K) and has interior dimensions of 0.5 mx0.3 m X 0.3 m. If you fill the inside with an ice-water mixture (so the temperature is maintained at 4°C) and leave the cooler on the porch on hot summer day (ambient temperature of 30°C ), what is the heat flux through the container wall? Assume negligible heat gain through the base of the cooler. You may have to...
A window glass has dimensions, 1.04 m high, 2.34 m wide and 1.341 cm thick, with a thermal conduc...
A window glass has dimensions, 1.04 m high, 2.34 m wide and 1.341 cm thick, with a thermal conductivity of 0.81 Wm10c-1. The outside- surface temperature is 32 °C and the inside-surface temperature is 24°c. Calculate the rate of heat transfer, in watts, through a plane of window glass, giving your answer to 3 decimal places.
A window glass has dimensions, 1.04 m high, 2.34 m wide and 1.341 cm thick, with a thermal conductivity of 0.81 Wm10c-1. The outside-...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal con...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal conductivity of 0.8 W.m1ec1. How much heat flows through the wall in a 12-hour period when the average inside and outside temperatures are 20 °C and 5 °C respectively? Will a 2 kW heater operating in the room compensate for the heat loss? Justify your answer. A layer of insulating material of thickness 5...
QUESTION 1 Quarter of the area of a 5m x 3m outside wall of a house is made of glass windows. The wall is 15 cm thick and has an average thermal conductivity of 0.8 W/m K. The window glass is 8 mm thick and has an average thermal conductivity of 0.15 W/m K. On a winter day the inside temperature of the wall and the glass is 20°C, and the outside air temperature is -10°C. The outside convection heat...
A concrete wall of a house is 45 cm thick and has a surface area 20m x 5 m. The inside temperature of the wall is 47 °C and the outside air temperature is 14 °C. Thermal conductivity of the concrete wall is 0.8 W/mK. Calculate the heat transfer rate through the wall by conduction and its thermal resistance.
Question 1: Your bear cooler is made of 20-mm-thick polystyrene (k = 0.021 W/m.K) and has interior dimensions of 0.5 mx0.3 m X 0.3 m. If you fill the inside with an ice-water mixture (so the temperature is maintained at 4°C) and leave the cooler on the porch on hot summer day (ambient temperature of 30°C ), what is the heat flux through the container wall? Assume negligible heat gain through the base of the cooler. You may have to...
A window glass has dimensions, 1.04 m high, 2.34 m wide and 1.341 cm thick, with a thermal conductivity of 0.81 Wm10c-1. The outside- surface temperature is 32 °C and the inside-surface temperature is 24°c. Calculate the rate of heat transfer, in watts, through a plane of window glass, giving your answer to 3 decimal places.
A window glass has dimensions, 1.04 m high, 2.34 m wide and 1.341 cm thick, with a thermal conductivity of 0.81 Wm10c-1. The outside-...
(b) The brick wall of a building has dimensions of 4 m by 10 m, and it is 15 cm thick with a coefficient of thermal conductivity of 0.8 W.m1ec1. How much heat flows through the wall in a 12-hour period when the average inside and outside temperatures are 20 °C and 5 °C respectively? Will a 2 kW heater operating in the room compensate for the heat loss? Justify your answer. A layer of insulating material of thickness 5...
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