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You need to understand the difference between power - as in watts - and energy - as in Watt hours. Watts/kiloWatts only tells you what it's doing at the moment, at that very instant.
While Wh/kWh tell you the sum of what it's been doing over a certain time.
1 kW = 1000 w So 100 W / 1000 W = 0.1 kW
As soon at the light is turned on, the lamp starts to use energy at the rate of 100 W = 0.1 kW
If you leave it on for 24 hours it will have used up 0.1 x 24 = 2.4 kWh
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How much power in watts will an led bulb consume if its energy is 6 joules?
Joules (energy) are not equivalent to Watts (power).If something converts 6 Joules every second, it is 6 Watts. If it takes ten seconds to convert 6 Joules, its power is 0.6 Watts.Multiply the Watts by the seconds to find the Joules.CommentYou do not 'consume' power. Power is simply a rate; you cannot consume a rate! You consume energy; the rate at which you consume it is power.
What energy is produced by a 60 W light bulb lit for 4.3 hours?
first you have to conver 4.3 hours into seconds, which is 15480seconds and then you multiply that by the power which is 60 W, which then you get 928800 Joules
How many hours did Edison light bulb stay lit?
66
When You replace a 100 W incandescent light bulb with a 22 W CFL bulb. If you leave your lights on 24 hours a day how much energy are you saving each day by replacing this bulb?
A watt means a joule per second; a day has 86,400 seconds. You can base your calculations on that.If you prefer to have the answer in kilowatt-hours (kWh) instead of joules, divide the watts by 1000 to convert to kW.
How do you find the mass of a light bulb?
251.0
60-watt light bulb in jouls?
To calculate the energy used by a 60-watt light bulb in joules, you need to convert the power (watts) to energy (joules). First, convert watts to joules per second (1 watt = 1 joule/second), then multiply by the time the light bulb is on. So, for example, if the light bulb is on for 1 hour (3600 seconds), the energy used would be 60 watts * 3600 seconds = 216,000 joules.
How many joules are saved by a energy efficient light bulb?
there are 100 joules in an energy efficient light bulb 75 joules go towards the light and 25 joules go towards the heat
How many Joules of electrical energy does a 100 Watt light bulb consume from the electrical supply in 2 seconds?
In 2 seconds, a 100 Watt light bulb consumes 200 Joules of electrical energy from the electrical supply (100 Watts * 2 seconds = 200 Joules).
If a 100 w light bulb is lit for 8 hours each day for W days in a month many kilowatt-hours will the bulb consume?
Convert the 100 watts to kilowatts. Calculate the total time in hours, and multiply by the number of kilowatts that the light bulb uses.
How many kwh does a 200w light bulb use?
A 200W light bulb will use 0.2 kWh (kilowatt-hour) of electricity per hour of operation. If the bulb is on for 5 hours, it would consume 1 kWh.
What is the effiency of 60watt bulb run on a 100joule?
"60 watts" means "60 joules every second". That's what a '60 watt' bulb is designed to consume. If you put 100 joules of energy into a light bulb, 100 joules of energy are going to come out of it, one way or another. Either that energy will be converted into light and heat by the bulb's filament, or else it won't get consumed at all, and it'll come out the other side of the bulb and still be available for use in some other device. So, comparing output energy to input energy is not an effective way to evaluate the efficiency of a light bulb. What you need to do, in order to compare the economy and effectiveness of light bulbs, is to compare LIGHT output to input ENERGY.
How much power in watts will an led bulb consume if its energy is 6 joules?
Joules (energy) are not equivalent to Watts (power).If something converts 6 Joules every second, it is 6 Watts. If it takes ten seconds to convert 6 Joules, its power is 0.6 Watts.Multiply the Watts by the seconds to find the Joules.CommentYou do not 'consume' power. Power is simply a rate; you cannot consume a rate! You consume energy; the rate at which you consume it is power.
How long could 90 Js of energy light a 40 Watt light balb.?
To calculate this, we first need to convert the energy from joules to watt-hours. 90 joules is equal to 0.025 watt-hours. Therefore, with 0.025 watt-hours of energy, a 40 watt light bulb would last for approximately 0.000625 hours or 0.0375 minutes.
What is the formula to calculate how much a light bulb uses?
The formula to calculate the energy usage of a light bulb is Power (Watts) x Time (hours) = Energy Used (Watt-hours). For example, a 60-watt light bulb used for 5 hours would consume 300 Watt-hours of energy.
What is the heat generated with a 40Watt bulb when its for 2 hours?
Let's assume that this is an incandescent bulb with a light efficiency of 35 percent ... i.e. 35 percent of the electric power it consumes is converted to light, and the other 65 percent becomes heat, which the bulb then dissipates into the room. So the bulb is dissipating heat at the rate of (0.65 x 40) = 26 watts = 26 Joules per second. 2 hours = (2 x 3,600) = 7,200 seconds 26 joules per second x 7,200 seconds = 187,200 Joules of heat
What energy is produced by a 60 W light bulb lit for 4.3 hours?
first you have to conver 4.3 hours into seconds, which is 15480seconds and then you multiply that by the power which is 60 W, which then you get 928800 Joules
How many watts does a light bulb use per week?
Your question is rather like asking "How many miles per hour do you do in a week?" You don't consume watts over time, it's a measure of how many joules of energy you consume over time.
