Amodel air rocket with a mass of 50.g is free to travel along a horizontal track. it begins from rest. after 2.0s, the rocket has lost 10% of its mass by expelling air at an average velocity of 53.m⋅s−1. what is the velocity of the rocket at that moment

Explanation:

Given:

Now the momentum of air will be equal to the momentum of rocket in the opposite direction: (Using the theory of elastic collision)

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.