If the vertical component of velocity for a projectile is 7.3 meters/second, find its hang time.

v = Vi - g t

v = 7.3 - 9.81 t (approximately on earth)
v = 0 at top
9.81 t = 7.3
t = 7.3/9.81
same time to fall
so
2 * 7.3 / 9.81 = about 1.5 seconds