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What else can I help you with?
Do energy efficient bulbs really reduce an electric bill?
Yes A 100watt light bulb left on for 10 hours will use a much electricity as a 1 Kilowatt fire left on for one hour. An energy efficient light bulb giving out the same amount of light as a 100watt bulb, only actually uses 20watts of electricity. That is 1/5th of the electricity, it will need to be on for 50 hours to use as much as a 1 Kilowatt fire left on for one hour. This will reduce your electric bill but the bulbs are more expensive than old 100watt bulbs (but the energy efficient bulbs last 6-8 times longer! so this balances out).
What type of energy is useful in light?
Light is energy. Light is made of massless particles called photons that travel at the speed of light. Photons at a given frequency carry energy equal to the Planck constant times the photon's frequency.
How does the energy of three photons of blue light compare with that of one photon of blue light from the same source?
If the color (frequency, wavelength) of each is the same, then each photon carries the same amount of energy. Three of them carry three times the energy that one of them carries.
What uses more energy a 60 watt light bulb or 18 watt light bulb?
This depends on how long it is being used. The 60 Watt bulb consumes 2.6667 times the power of an 18 Watt bulb, but energy equals power times time. There is also an amount of 'hidden' energy: the energy to manufacture and transport the bulb. This depends on how long it is being used. The 60 Watt bulb consumes 2.6667 times the power of an 18 Watt bulb, but energy equals power times time. There is also an amount of 'hidden' energy: the energy to manufacture and transport the bulb.
What does the E in Enstien's equation?
E = energy e=mc2 (or Engergy (e) equals Mass (m) times the Velocity of Light (c) squared {the speed of light times itself}).
Do energy efficient bulbs really reduce an electric bill?
Yes A 100watt light bulb left on for 10 hours will use a much electricity as a 1 Kilowatt fire left on for one hour. An energy efficient light bulb giving out the same amount of light as a 100watt bulb, only actually uses 20watts of electricity. That is 1/5th of the electricity, it will need to be on for 50 hours to use as much as a 1 Kilowatt fire left on for one hour. This will reduce your electric bill but the bulbs are more expensive than old 100watt bulbs (but the energy efficient bulbs last 6-8 times longer! so this balances out).
Energy is the speed of light squared times what number?
Not a "number." Energy is the speed of light squared times mass, so E = mc2.
What does the funny formula the Einstein made up mean?
energy=mass times speed of light squared (times by itself) (e=energy m=mass c=speed of light) *This formula calculates the energy that an object can release when its atoms are split (Same process used in atomic bombs). The formula means Energy is equal to mass times the speed of light times the speed of light again. In other words energy = mass x speed of light x speed of light. In numbers it would be energy = mass x 299'792.456 x 299'792.456 (Speed of light = 299'792.456 km/s)*
Who discovered the equation energy times speed of light squared?
Einstein
How can you tell the energy released based on the color of the light?
The frequency of the light is the color and the energy is E=hf or Planck's Constant times the color or frequency.
Do all colors of light have the same energy?
Actually no. Energy equals Planck's constant times frequency.
Why are you not allowed to buy 100watt bulbs?
You are still allowed (please note spelling) to buy conventional tungsten bulbs at 100 watts, but not for much longer. We are encouraged to use the 'low energy' lamps which are 4 or more times more efficient in their use of electricity than tungsten bulbs, thus reducing energy use and reducing global warming.
What was einsten's energy equation?
e=mc^2 energy is equal to (mass) times (the speed of light squared)
What dos Emc2 mean?
Energy equals mass times the speed of light squared. Energy and mass are equivalent.
What type of energy is useful in light?
Light is energy. Light is made of massless particles called photons that travel at the speed of light. Photons at a given frequency carry energy equal to the Planck constant times the photon's frequency.
Light with an energy equal to three times the work function of a given metal causes the metal to eject photoelectrons. What is the ratio of the maximum photoelectron kinetic energy to the work functio?
The maximum photoelectron kinetic energy is given by the equation: Energy of incident light - Work function. If the energy of the incident light is three times the work function, then the maximum kinetic energy of the photoelectrons will be three times the work function. Therefore, the ratio of the maximum photoelectron kinetic energy to the work function is 3:1.
How does the energy of three photons of blue light compare with that of one photon of blue light from the same source?
If the color (frequency, wavelength) of each is the same, then each photon carries the same amount of energy. Three of them carry three times the energy that one of them carries.
