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The definition of a Watt is 1 Joule/second. Therefore:
150W * 60 Sec = 9000 Joules / minute.
In units more applicable home energy use, 9000 Joules/minute equals .0025 Kilowatt Hours (KWh)/minute.
On a cost basis, if for example, electricity from a power company costs $.20 per KWh, the 150W light bulb costs 3 cents per hour to use.
One watt means 1 joule/second. Therefore, 1 joule = 1 watt x 1 second.You need to do the following:* Convert the minutes to seconds.
* Multiply the power (watts) by the time in seconds, to get joules.
* Convert that to kJ.
A 150 watt light bulb uses 0.15 kW (150 watts divided by 1000) of energy per hour. In a minute, it would use 0.0025 kWh (0.15 kW divided by 60 minutes).
a 75 watt lightbulb would use 0.3125 (75/240) watt hours, or 0.0003125 kwh, of power in 15 seconds.
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What does 40 watts bulb mean?
A 40-watt bulb refers to the power consumption or energy usage of the bulb. It indicates the amount of electricity the bulb consumes when it is turned on. In general, the higher the wattage, the brighter the light emitted by the bulb.
Compare and contrast a 60 watt and 100 watt light bulb?
A 100 watt light bulb is brighter and consumes more energy compared to a 60 watt light bulb. The 100 watt bulb will produce more light output but also generate more heat, while the 60 watt bulb will be dimmer and more energy-efficient.
How much energy does a sixty watt light bulb use to yield light?
It takes 60 watt-hours. Same as lighting a 1-watt bulb for 60 hours; or 60 bulbs of 1 watt each for 1 hour. You get the idea.Notice the units: watt-hours, not watts. Watt is a unit of power, watt-hour is a unit of energy. 1 watt-hour = 0.001 kWh (kilowatt-hour) = 3600 joules = 860 calories = 3.4 BTU.
Does wavelength determine the watts of a bulb?
No, wavelength and watts are different properties of light. Wavelength refers to the color or type of light produced, while watts measures the amount of power or energy the bulb consumes to produce light. The brightness of a bulb is more closely related to its wattage rather than its wavelength.
If a lamp bulb is rated at 100 watt why is a time factor not in the rating?
The wattage rating of a lamp bulb is a measure of the power it consumes, not the duration it operates for. The rating tells you how much power the bulb will use when it is in operation, but it does not provide information about how long the bulb will last before needing to be replaced.
When 60 W means that W joules of energy are transferred into the bulb each second. In use how much energy is given out by the bulb each second?
The light bulb will use electrical energy at the rate of 60 W (60 J/s), and it will emit that energy, also at the rate of 60 W.Note that in any real light bulb, only part of the energy is emitted as visible light. The remainder is mainly heat.
What will happen to the second light bulb if the first light bulb burns out?
The second light bulb will stay lit as it is not affected by the first light bulb burning out. Each light bulb works independently from one another.
What happen to an electric current after it passes through each bulb?
There is a piece of filament in every light bulb, which has so much friction that when the electric current passes through it, heat energy is produced. This heat energy is then converted to light energy.
How much energy do you save with 10 light bulbs off?
That depends on the power used by each light bulb. Look at the specifications for a specific light bulb, then multiply the power by 10. Note that energy = power x time; that is to say, the energy spent by a light bulb depends on its power, but also on how long you keep it on. Specifically, watts = joules x seconds.
What type of energy can be converted into another?
Various forms of energy can be converted into each other, such as thermal energy into mechanical energy in a steam engine, electrical energy into light and heat in a light bulb, and chemical energy into kinetic energy in our muscles.
What does 40 watts bulb mean?
A 40-watt bulb refers to the power consumption or energy usage of the bulb. It indicates the amount of electricity the bulb consumes when it is turned on. In general, the higher the wattage, the brighter the light emitted by the bulb.
Compare and contrast a 60 watt and 100 watt light bulb?
A 100 watt light bulb is brighter and consumes more energy compared to a 60 watt light bulb. The 100 watt bulb will produce more light output but also generate more heat, while the 60 watt bulb will be dimmer and more energy-efficient.
How is energy transferred from the cell to the bulb in parallel circuits and series circuits?
In a parallel circuit, energy is transferred from the cell to the bulb through separate paths, with each component receiving full voltage. This allows bulbs to operate independently, without affecting each other. In a series circuit, energy is transferred from the cell to the bulb in a single path, where the components share the same current. If one bulb goes out, it breaks the circuit and all bulbs will not light up.
Would taking a light bulb from a parallel circuit affect the energy transfer?
Taking a light bulb from a parallel circuit would not significantly affect the energy transfer in the circuit. Each component in a parallel circuit receives the full voltage of the circuit, so removing a single light bulb would not substantially affect the flow of energy to the other components. The overall energy flow in the circuit would continue, with the remaining components receiving their appropriate voltage.
If a light bulb is connected between 2 wires and both wires have 300 volts of electrical energy is the light bulb lit?
A light bulb connected between to wires, each having 300 volts to ground that are in phase, will not light, because there is no differential voltage available to do any work. If each wire has 300 volts to ground and are out of phase (600 volts between them) the light bulb will be lit, if it is rated at least for 600 volts, otherwise it will burn out.
How much energy each of the bulb will get in the two circuits?
The total energy delivered to each bulb in a circuit depends on the voltage of the circuit and the resistance of the bulb. In a series circuit, the total voltage is divided among all bulbs, so each bulb receives less energy compared to a parallel circuit where each bulb gets the full voltage of the circuit.
Explain the difference between energy efficiency and energy conservation Give an example of each?
Efficiency is a measure of how completely you use energy, whereas conservation is a measure of how little energy is used. For example: A typical light bulb turns 2% of the power input into light, therefore it is 2% efficient. Not turning the light bulb on in the first place uses no power, and therefore conserves electricity.
