there are 100 joules in an energy efficient light bulb 75 joules go towards the light and 25 joules go towards the heat

1) The power use of bulbs is specified in units of power, not energy. In other words, watts - which means joules per second. 2) Light-bulbs come in different capacities. 3) It is incorrect to say that the energy (or power) "is in" the light-bulb. The light-bulb simply transforms one type of energy to another, using electrical energy which is NOT stored in the light-bulb.

Every second a 150 Watt bulb converts 150 Joules from electricity into heat and light. The number of Watts tells you how many Joules pass per second.

100 watts means 100 Joules/Second. So in 24 hours, the bulb would use 24*60*60*100 Joules. so that's 8,640,000 joules

Watt means joules/second. It refers to the amount of energy a device uses, in this case. Multiply the power (in watts) by the time (in seconds) to get the energy (in joules).

welll it really depends on the volasity of light energy but from my calculatios it is 900

it takes about 120 volts to power the average light bulb <><><><><> However, there are many different type of light bulbs, operating on different voltages, so it really depends on the type of light bulb.

The only power used by a desk light is that used by the bulb. The bulb normally has its power in watts marked on it.

60 watts means the same as 60 joules per second. This is the energy used; all of the energy will be given off by the light bulb (but not all of it will be radiated as visible light).60 watts means the same as 60 joules per second. This is the energy used; all of the energy will be given off by the light bulb (but not all of it will be radiated as visible light).60 watts means the same as 60 joules per second. This is the energy used; all of the energy will be given off by the light bulb (but not all of it will be radiated as visible light).60 watts means the same as 60 joules per second. This is the energy used; all of the energy will be given off by the light bulb (but not all of it will be radiated as visible light).

There are light bulbs of many different voltages and power.

Depends what type of light bulb, look on the bulb it should be marked with the voltage rating.

Depends on the power rating of the bulb, and what voltage the grid is at.

Almost 90 % of electrical energy provided to an incandescent light bulb goes as heat and rest as light. A 100 Watt bulb puts out 100 Joules of heat per second. So - for one minute it would put out 6000 Joules (100 Watts X 60 seconds). 1 BTU (British Thermal Unit) of heat = 1055.056 Joules. So a 100 watt bulb, burning for one minute would put out 5.68 BTUs of heat. ( 6000 Joules / 1055.056 Joules) = 5.68 BTUs. Same bulb burning for one hour would generate 341 BTUs of heat.

Joule is the unit of energy. Watt is the unit of power. One Joule provides one Watt for one second. A 100 Watt lamp uses 100 Joules per second.AnswerPower is the rate of doing work. Work is measured in joules, so power is measured in joules per second. However, in SI, a joule per second is given a special name: the watt. So a 100-W lamp consumes 100 J of energy per second.

AnswerIt is my opinion is that the light bulb can be important like if it was a dark night and you wanted light. You could turn the light on (light bulb). I also think it is stupid because if the power went out you couldn't use the light bulb because you need power!AnswerThe light bulb is important because it lead to the infrastructure of electricity in society and all of the many things that we now use electricity for. The practical light bulb led the way to so many other useful inventions; it 'shed light' on what was possible.

That depends on how many volts does that bulb use not watts...

100 watts running for 60 seconds uses 100 x 60 Joules of energy. A Joule is the same as a watt-second.

It's 100 watts times 3600 seconds, that's 360,000 joules of energy. A joule is 1 watt for 1 second.

4763796726796776by the power of ten

Onions don't have volts.

Yes, even a potato can light a light bulb. Yes. If the batteries match the voltage of the bulb, they can light it. Flashlights have bulbs and batteries that power them. If you mean a household light bulb, then you'd need many batteries in series (80 of the 1.5 volt batteries).

Those numbers describe the power used by the two bulbs, in other words how many joules of electrical energy they use per second. The 100 watt bulb uses 40 watts more.

Every person has a different power of light bulb. In my room, I have a 7.5 and a whole bunch of 60s. The number of watts you choose for your light bulb depends on how bright you want your light to be. The higher the number, the brighter it is.

Light bulb power is measured in watts, and there are 1000 watts in a kilowatt.

This is a very good question. A Watt is a unit of power, or energy with respect to (divided by) time, and is defined as 1 Joule per second. A 100 Watt light bulb consumes energy at a rate of 100 Joules (J) per second (s). There are 60 seconds in every minute, and 60 minutes in every hour. So also, there are 3600 seconds in every hour (60 X 60). 100 J/s X 3600s = 360,000 J (the s cancels out in the division) Your bulb consumes 360,000 Joules in one hour.

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