spaceship takes a straight line path from the earth to the moon, a distance of about 400000 km. Suppose it accelerates at 5 m/s2 for the first 10 min of the trip, then travels at constant speed until the last 10 min, when it accelerates at – 5 m/s2, just coming to rest as it reaches the moon (a) What is the maximum speed attained? (b) What total time required for the trip?

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.

Avoltaic cell converts chemical energy to

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up