Which of the following objects is in equilibrium? a- a car moving at a constant velocity b- a bicicle sitting on the ground c- an apple falling form a tree d- a motorcycle speeding up

A bicycle sitting on the ground is the statement that suits best to describe the objects in the equilibrium.

Option B

Explanation:

Equilibrium refers to the static state when there is no movement or displacement. In other words it also means that the forces acting on the object are equal and opposite in direction and the net force will be zero as they are in opposite direction and hence the object doesn't move and remains in the static position. The options A,C,D are related to movement of the object.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

their crystal patterns have been disrupted by stress