An important news announcement is transmitted by radio waves to people sitting next to their radios 42 km from the station and by sound waves to people sitting across the newsroom 9.26 m from the newscaster. taking the speed of sound in air to be 343 m/s, who receives the news first?

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