An experimental rocket car moves along a straight track at a constant speed of 90.0 m/s. the car passes a group of officials, travels a distance of 270.0 m and then explodes. if the officials hear the sound of the explosion 3.8 s after the car passes their position, what is the speed of sound on that day?

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