As light from air to water to glass, it will refract. the best explanation for this would be
a) glass is less transparent than water, which is less transparent than air.
b) light will be transmitted into the new medium each time it reaches a boundary.
c) a light wave reflects off molecules as it travels, this causes the light to bend,
d) the speed of a wave slows down as it travels at different speed in different media.

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?