That will depend on lots of things; mainly, from how high it falls, what's its initial velocity, as well as its shape and size (which will affect air resistance).
The answer depends on its velocity when it runs out of propellant and then on its aerodynamic properties.
The answer will depend on what "it" is, and on what its initial velocity is.
2s
if you ignore air resistance, it would take about 3.5 seconds; at ttat point where it hits the ground it is traveling at 75 mph. Because of the air drag, it may take a bit longer to hit the ground.
This is a velocity question so u need to use uvaxt
Assuming they were in a vacuum, if both objects were dropped from th esame height, then both take the same length of time to reach the ground. All masses fall with the same acceleration, reach the same speed in the same period of time, and hit the ground at the same time. Otherwise and if there is an atmosphere or if they are dropped from different heights, you have not presented information; shape and size are the most important factors.
A long time...
it takes 7 minutes
5 seconds
The answer will depend on what "it" is, and on what its initial velocity is.
Once it starts to develop a tornado may take any where from several minutes to a few seconds to reach the ground.
8.1 seconds
4 seconds
What happens if a firework hits the star is it will explode anyway it is Impossible for a firework to hit the sky, that because a star is way higher then a firework.
it will take about 30 seconds to 1 whole minute.
The longer you delay, the faster your speed when you hit the ground.
2s
51 seconds.