Auniform linear charge density a is placed on an infinitely long wire. the wire is parallel to an infinite grounded plane, and a distance b above that plane. to make things specific, the points on the wire are described as (x, 0, b), and the conducting plane is z 0. a. find the potential v(o, y, z) for z> 0. b. find the induced charge density ơ(x, y) on the conducting plane

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

Aplayer uses a hockey stick to push a puck at a constant velocity across the ice. the weight of the puck is 170 n. the coefficient of friction is 0.0600. with what force must the player push the puck so that his force just equals the frictional force? 28.3 n 0.999 n 0.102 n 0.0104 n

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.