Find both the skin depth (δs) and the depth at which the e-field amplitude of a radio wave decreases to 1/1000 of its value at the ocean surface, at each of the frequencies 1 khz, 10 khz, 100 khz, 1 mhz, 10 mhz. take the parameters for seawater to be μr=1, =80, σ = 4 s/m. explain why submarines use ulf (ultra-low-frequency) radio waves at 1 khz to communicate?

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

if they have a finite resultant

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.