What might cause a shotgun to explode?
this is due in like 10 mins so help me please

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

The substances that are necessary for producing of certain hormones and that store and transport vitamins