The power in an electrical circuit is given by the equation p = i2r, where i is the current flowing through the circuit and r is the resistance of the circuit. what is the current in a circuit that has a resistance of 30 ohms and a power of 2 watts

The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.21 μs. in a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 7.04 μs. for the moving muons, what are (a) β (b) k, and (c) p? the rest energy of the electron is 0.511 mev.

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An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices