Aspace shuttle is approaching the surface of the moon to land. it approaches the moons surface with an initial velocity of 28m/s and is slowing at a rate of -2m/s^2. show all work and units for problems. a) draw velocity vs time graph
b) when will shuttles velocity equal zero?
c) how far above the surface of the moon was the shuttle when it began to slow down?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

The least penetrating form of radiation is