If I roast a marshmallow is it a physical or chemical change, how do I know?

If a simple machine reduces the strength of a force, what must be increased?

Debris produced by mining is called

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.