Well, the first step is to learn joules and you'll be set!
To find out how much energy is transferred in an hour in joules, you need to know the power consumption of the device in watts. You can calculate the energy transferred by multiplying the power in watts by the time in hours. The formula is Energy (joules) = Power (watts) x Time (seconds).
This is not a valid question by itself. Joules are units of energy, while Amps are units of electrical current. However, if you also know the Voltage of the electrical current, you can multiply the Current[Amps]*Voltage[Volts] to get the Power in Watts. Watts are equivalent to Joules per second. If you then know the amount of time of the current flow, you can calculate the total number of Joules by multiplying the Power[Watts]*Time[seconds] = Energy[Joules] .
The number of amps cannot be determined from just the energy in joules. To calculate the current in amps, you would need to know the voltage of the circuit as well. Amps is equal to power (in watts) divided by voltage.
You can't. If you know the voltage (volts) and current (amperes), you can convert to power (watts), but power is not energy. Power is the rate of energy (joules per second). You need to know the time as well to determine energy.
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If you know the power you do not need to calculate it by anything. And if you don't, the answer will depend on what measure you do know!
We have no way of knowing what power the machine was rated for, but with the information given in the question, we can calculate the power it delivered during the crate-lift: It was (1.96) x (mass of the crate in kilograms) x (distance the crate was lifted in meters) watts.
Power is joules per second, also known as watts. You can calculate watts if you know volts and amperes by simply multiplying them together, because volts is joules per coulomb and amperes is coulombs per second - multiplying them gives you joules per second. It gets a little complex when you start talking about AC power, because current and voltage is not always in phase, but the principle is the same.AnswerThere is no such thing as 'electric' power. Power is not a 'thing', it's a rate: the rate of doing work, or of heat transfer, expressed (as explained above) in joules per second which has been given the special name, the watt.
To calculate power from the ideal gas equation PV = nRT, you need to know the amount of work done in the system. Power is equal to the rate at which work is done, which is measured in joules per second (watts). To calculate power, you need to use the formula Power = Work / Time, where Work = PΔV for a constant pressure process.
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i dont know.... plz tel how to calculate
To convert joules to watts, you need to know the time over which the energy is expended. Since power in watts is defined as energy in joules divided by time in seconds, you cannot directly convert 7000 joules to watts without knowing the time duration.