A student living in a 3-m * 4-m * 4-m dormitory room turns on her 100-W fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 8 h later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 20°C in the morning when she leaves.

Q: Estimate the rate of heat transfer through the Styrofoam insulation in the walls of a kitchen…

A: Given the area of the wall A=4.0m2 inside temperature T1=4.0oC outside temperature T2=25.0oC…

Q: A certain coal-fired power plant has a rated power capacity of P = 950 MW. The output of this plant…

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Q: Two substances, A and B, which are of equal mass but at different temperatures, come into thermal…

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Q: A glass windowpane in a home is 0.62 cm thick and has dimensions of 1.3 m × 2.2 m. On a certain day,…

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Q: a). How much energy is given to your body when 0.4 kg of steam condenses on your skin? b). If the…

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Q: A thirsty nurse cools a 2.40 LL bottle of a soft drink (mostly water) by pouring it into a large…

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Q: A thirsty nurse cools a 2.30 LL bottle of a soft drink (mostly water) by pouring it into a large…

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Q: The uncertainty in the quantity C = A + B is given as 6C = 6A + 6B. True False Reset Selection

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Q: A 0.264-kg coffee mug is made from a material that has a specific heat capacity of 907 J/kg C° and…

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Q: QUESTION 19 Consider N solar collectors (N= 12, 14, 16), of dimension [2m x 2m, 2m x 1.5 m, 2m…

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Q: If you are stranded in a cold and snowy environment, it is never a good idea to eat snow for…

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Q: Five people, all about equal masses, are in a perfectly sealed room in which the air conditioner is…

A: Five people, all about equal masses, are in a perfectly sealed room in which the air conditioner is…

Q: 0.80. Calculate the surface temperature of the probe. Assume that there are no radiative

A: Given: d=65 cm P=450 W e=0.80 Formula used: A=π4d2 PA=eσT4

Q: Two large rectangular sheets of charge of side L = 2.0 m are separated by a distance d = 0.065 m.…

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Q: The structure of a house is such that it loses heat at a rate of 4500 kJ/h per "C difference between…

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Q: 0.562 kg sample of liquid water and a sample of ice are placed in a thermally insulated container.…

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Q: A 0.298-kg coffee mug is made from a material that has a specific heat capacity of 921 J/kg C° and…

A: The knowns in this problem are: mass of the coffee mug (m1) = 0.298 kg, specific heat capacity of…

Q: A glass windowpane in a home is 0.62 cm thick and has dimensions of 1.2 m × 2.2 m. On a certain day,…

A: Given, Length of the glass windowpane (L) (across which heat is flowing) = 0.62 cm Area of the glass…

Q: 1. Suppose a woman does 500 J of work and -9400 J of heat transfer occurs into the environment in…

A: Workdone, W = 500 J Heat transferred, Q = -9400 J

Q: A 100-gram apple is dropped off a 200 m high cliff. As it falls its temperature drops by 2.5 °C due…

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Q: A large block of lead, initially at rest, falls to the ground from a height of h = 0.65 m. The…

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Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.