What is the speed of light through a substance with index of refraction of 1.22?

3.66 × 10^8 m/s

3.00 × 10^8 m/s

2.01 × 10^8 m/s

2.46 × 10^8 m/s

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)