When transferring electric charge, an object becomes positive when it . A.
gains protons

B.
loses protons

C.
loses electrons

D.
gains electrons

C.

Explanation:

Swapping electrical charges will always have to do with electrons, so A & B can be eliminated easily.

Electrons will be the ones transferring over to the new object. Electrons are naturally negatively charged, so anything that gains electrons will become negatively charged themselves. Whereas if they lose electrons, they will become positively charged.

It's worth noting that protons and electrons have the same exact numerical charge, but they are both opposites. Electrons are negative, and protons are positive. Neutrons on the other hand have no charge (hence the "neutral" root in its name).

this is poiselle's equation from fluid mechanic in physics. mech eng

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.