The spring-loaded launcher fires a 5kg projectile. Readying the launcher compresses the spring by 30cm. Aimed straight up, the projectile reachers a hight of hmax=4.7 meters when launched.

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

How do you tell if someone actually cares about you? and just say they do?

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?