Which statement about velocity is true? a. it has only magnitude. b. it has only direction. c. it has magnitude and direction. d. it is a scalar quantity.

The correct answer is Option C.

Explanation:

There are 2 types of quantities:

1. Scalar quantity: To describe these quantities, only magnitude is required. For example: Speed, distance etc..

2. Vector quantity: To describe these quantities, we require both direction and magnitude. For example: Velocity, displacement etc..

Velocity is defined as the rate of change of displacement.

Mathematically,

where, v = velocity

d = displacement

t = time

As, velocity is a vector quantity.

Hence, the velocity has both magnitude and displacement. Therefore, the correct answer is Option C.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

i'm assuming that it's c.) red bank..