Atoy car is tied to a string and pulled across a table horizontally. which is the
correct free-body diagram for this situation?

D

Explanation:

With acting as a downward force, there must be a normal force counteracting it, because the toy car is not accelerating in the y direction. This force is the Normal Force or .

The Tension force must be going in the horizontal direction because the toy car is being pulled horizontally, so mist be going to the right.

found in the nucleus

has mass of one amu

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge