Which is an example of an object increasing its kinetic energy Question 3 options:

an airplane after landing on a level runway.

a rocket before launch.

a train stopped at the station.

a mouse running faster after spotting a cat.

The answer to this question is the A choice. A rocket before launch.

Explanation:

In the definition of kinetic energy, it says: In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)