Biology
Biology, 30.08.2019 22:00, jwjohnson20

Doesa light bulb converts electrical energy into both heat and light energy.

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Mathematics, 07.07.2019 02:00, drashanhparekh123
Erin is experimenting with a simple electrical circuit. when she connects a light bulb to a battery, the light bulb begins converting electrical energy into light energy and heat energy. if the battery supplied 25 kilojoules of electrical energy to the light bulb, and the light bulb gave off 4 kilojoules of light energy, how much heat energy did the light bulb give off?
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Engineering, 26.07.2019 16:10, shelbycg02
An incandescent lightbulb is an inexpensive but highly inefficient device that converts electrical energy into light. it converts about 10 percent of the electrical energy it consumes into light while converting the remaining 90 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 a 10-cm-diameter 100-w lightbulb cooled by a fan that blows air at 25°c to the bulb at a velocity of 2 m/s. the surrounding surfaces are also at 25°c, and the emissivity of the glass is 0.9. assuming 10 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, determine the equilibrium temperature of the glass bulb.
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Physics, 14.10.2019 14:30, cp838761
a light bulb converts electrical energy into light energy and also some thermal energy. the amount of electrical energy is 50 joules before the conversions. what is the total amount of energy from before the conversions to after the conversions? question 6 options: 45 joules because some energy is lost when it is put off as heat. 100 joules because you start with one form of energy and end up with two forms, so a number of energy doubles. 50 joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion. 55 joules because as more electricity comes from the light bulb, the joules increase.
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