An incandescent lightbulb is an inexpensive but highly inefficient device that converts electrical energy into light. it converts about 5 percent of the electrical energy it consumes into light while converting the remaining 95 percent into heat. the glass bulb of the lamp heats up very quickly as a result of absorbing all that heat and dissipating it to the surroundings by convection and radiation. consider an 8-cm-diameter, 60-w lightbulb in a room at 25°c. the emissivity of the glass is 0.9. assuming that 5 percent of the energy passes through the glass bulb as light with negligible absorption and the rest of the energy is absorbed and dissipated by the bulb itself by natural convection and radiation, determine the equilibrium temperature of the glass bulb. assume the interior surfaces of the room to be at room temperature
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Physics, 21.06.2019 23:30
A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?
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Physics, 22.06.2019 03:30
Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec
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Physics, 22.06.2019 12:40
Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)
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Physics, 22.06.2019 19:30
How many electrons in an atom could have these sets of quantum numbers? =3n=3 electronselectrons =4,ℓ=2n=4,ℓ=2 electronselectrons =6,ℓ=ℓ=−1n=6,ℓ=2,mℓ=−1
Answers: 3
An incandescent lightbulb is an inexpensive but highly inefficient device that converts electrical e...
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