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Modern porjectors do not give off as much heat as the old style ones did.
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∙ 14y ago
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Why Silicon and germanium emit light?
they emit heat when their is a recombination of electron and holes
Energy transformations in a projector?
Heat and light energy
What does a white light bulb emit?
light and heat
What are the five sources of light and heat?
1. The main source is the sun. Even though rocks seem like they emit heat, they really got their heat initially from the sun. 2. Radioactive substances emit their own energy and heat. 3. Warmblooded animals emit heat. However, they make the energy from the food they eat which ultimately came from the sun. 4. Electricity. Electricity can be used to make heat and light. 5. Other stars from other solar systems emit their own light.
What types of electromagnetic radiation do human bodies emit?
Heat.
Does the species of wood affect how fast the wood will burn?
Yes. Hard woods burn slowly and emit a lot of heat, whereas soft woods burn quickly and do not emit as much heat.
Why does shiny surfaces absorbe more energy then dull surfaces?
Because, shiny surfaces reflect heat, they don't emit much heat and they don't absorb much heat!
Why Silicon and germanium emit light?
they emit heat when their is a recombination of electron and holes
Do electric cars emit heat energy?
Yes. The electric motor does emit some heat. Also, when the car is stopping, forward energy is converted into heat.
What are the dangers of using a overhead projector?
The projector can reach a pretty high temperature if left on for a while. So I think the main danger of an overhead projector is simply the heat. ;)
Do polar bears emit heat?
yes
What type pf heat does uranium emit?
Uranium don't emit directly heat; under nuclear fission the kinetic energy released and the energy of radiations is converted to heat and after to electricity.
How many lumens does a good projector have?
A good projector will have 2000 or more lumens, but an LED projector will have much less.
What mass of natural gas CH4 must you burn to emit 267 kJ of heat?
5.33g CH4 must be burned to emit 267 kJ of heat.
What type of radiator of energy is an object that is a good absorber of radiation?
An object that absorbs heat well will also emit heat well. The object will emit heat until equilibrium is reached with its surroundings.
What do stars emit besides heat and light?
They emit: gamma rays, radio waves, and x-rays. Some stars emit T.V. rays
Energy transformations in a projector?
Heat and light energy
