Do change that cannot be easily reversed such as burning observe the law of conservation of mass

If a body goes from 10 m/s to 50 m/s in 8 seconds, what is it's acceleration?

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

What is the current through the 20 ohm resistor?

Calculate the mass of an 86kg object on the moon

A plane mirror is useful for seeing:

How many joules does a shortbread cookie have

What happens to frequency when an object is moving towards you?

What is the mid-atlantic ridge? how many miles does it stretch?

A basketball player jumps straight up for a ball. To do this, he lowers his body 0.260 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.

Why does Mars have moons even when its mass is small?