If a source of light is approaching us at 3,000 km/sec, then all its waves are If a source of light is approaching us at 3,000 km/sec, then all its waves are blue shifted out of the visible spectrum into the ultraviolet. red shifted out of the visible into the infrared. not affected, as c is constant regardless of the direction of motion. blue shifted by 1%. red shifted by 1%.

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s