If an object is thrown downward at 4.73 m/s and it falls for 6.21 seconds before landing, how fast is it falling the instant before it lands?

65.59 m /s

Explanation:

Initial velocity u = 4.73 m/s

Final velocity v = ?

time t = 6.21 s

acceleration = g = 9.8 m /s

v = u + gt

= 4.73 + 9.8 x 6.21

= 65.59 m /s .

show the wavelengths of a wave. show the crests of a wave.

vapour or gas assuming atmospheriv pressure