The table shows the speed of light in three states of matter. Material Speed (meters/second)
air
300,000,000
water
220,000,000
glass
200,000,000
At what point in time would the speed of light decrease?
A
when the light travels from water to air
B
when the light travels from air to water
с
when the light travels fronwglass to air
D
when the light travels from glass to water

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.