What is the power dissipation in a 68 Ω resistive load, when a 110-V (peak-to-peak) sine wave is applied to the resistor? The resistivity of a material used to make a round 950 Ω resistor is 53 Ω per...

What is the power dissipation in a 68 Ω resistive load, when a 110-V (peak-to-peak) sine wave is applied to the resistor?

The resistivity of a material used to make a round 950 Ω resistor is 53 Ω per unit length. If the resistor has a radius of 0.16 in, what is it’s length?