Ahummingbird can flap its wings 200 hz times per second. if the hummingbird produces waves that travel at 340 m/s by flapping its wings, what is the wavelength of these waves?

use wave speed equation:

wave speed (in m/s) = frequency (in hz) x wavelength (in m)
s = f
λ\lambda
λ

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?