I need help with physics, i didn't go to school and my teacher already teaching this ​

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Which best represents the law of conservation of mass ?

During the past 150 years in the united states, how did energy consumption compare to population growth