J. j. thompson is credited with discovering the

He was credited with the discovery and identification of the electron, the first subatomic particle to be described.

Explanation:

Joseph John Thomson was an important English physicist, born on December 18, 1856 in Manchester, who discovered the electron.

The atomic model of Thomson was proposed in the year 1898 by the English physicist Joseph John Thomson or simply J.J. Thomson. After having several experimental evidences on the existence of the electron, it overturned the theory of the indivisibility of the atom proposed by John Dalton.

Thomson, from his model, confirmed and proved the existence of electrons (particles with negative electric charge) in the atom, that is, the atom has subatomic particles.

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air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.