What is the acceleration of an object with a 4500g mass when there is a net force o 18 N on it

When the force changes, acceleration changes too, but the magnitude of its change depends on the mass of an object. This is not true in a situation when the mass also changes, e.g., in rocket thrust, where burnt propellants exit from the rocket's nozzle.

Explanation:

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic