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Power is the amount of energy produced (or consumed) for unit of time. For exemple, Sun's reaction produces $x$ MeV of energy per day. So, it's power is $\frac{x}{(24*60*60)} \frac{MeV}{s}$.
This familiar fact is based on the relationship between energy and power. You pay for the energy used. Since \(P = \dfrac{dE}{dt}\), we see that \[E = \int P dt\] is the energy used by a device using power P for a time interval t. If power is delivered at a constant rate, then then the energy can be found by \(E = Pt\).
Energy and power are closely related but are not the same physical quantity. Energy is the ability to cause change; power is the rate energy is moved, or used. main article. Energy is the ability to create a change, for example, creating motion. Tasks (like lifting a box) require an amount of energy to complete.
So firstly, power is the rate at which energy is transferred or the rate at which work is done. Secondly, the first equation to calculate power is: power equals energy transferred,...
Power is the amount of energy transferred or converted per unit time. In the International System of Units , the unit of power is the watt , equal to one joule per second. Power is a scalar quantity.
Electric power (P) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit for potential energy (PE) is the joule, power has units of joules per second, or watts. Thus, 1A ⋅ V = 1W.
use energy relationships to calculate work done. Key fact. Remember energy cannot be created or destroyed - it is always converted to other forms of energy. Question. An light aircraft of...
