The average power dissipated by a resistor connected to a sinusoidal emf is 5.0 w.

a) what is pavg if the resistance r is doubled?
pavg=ir2r
pavg=ir22r ∴=ir2r ∴pavg=2.5 w
b) what is p_{\rm avg} if the peak emf {\cal{e}}_0 is doubled?
c) what is p_{\rm avg} if both are doubled simultaneously?

The average power if both the resistance and peak emf are doubled simultaneously is 10 W.

a)

The average power is:

If the resistance is doubled. The new average power is:

b)

If the peak emf is doubled:

c)

If both are doubled simultaneously:

The average power if both the resistance and peak emf are doubled simultaneously is 10 W.

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moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

the results is a decrease in air temperature with an increase of altitude.

explanation: