Which statement describes all chemical changes, but not all physical changes? 1.bubbles are produced

2.A new substance forms.

3.phase changes occur

4.a color change occurs

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

What kind of simple machine is a catapult?

There is no gravity in outer space . explain why this statement is true or false