The cause of resistance to the flow of charge within an electrical wire is? . a) mobile charge carriers collide with atoms of the resistor. b) mobile charge carriers have mass (possess inertia) which resists their motion. c) the electric field that causes charge flow diminishes with distance. d) charge is consumed or used up as it flows through the wire.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?