In a source-free vacuum region: h cos (a) express h in phasor form (b) find the associated e field in the complex time varying form and the phasor form (c) determine w. (d) calculate the time averaged poynting vector. this is a real valued quantity.

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?