Which of the following is a vector quantity?a.momentumb.powerc.temperatured.energy

The answer is a. momentum.

Here's why:

A vector quantity is a quantity that has both magnitude (size) and direction.

a. Momentum is a vector quantity because it depends on the direction of the object's movement. It is calculated as the product of an object's mass and its velocity, both of which have direction.

b. Power is a scalar quantity. It is the rate at which work is done or energy is transferred, but it does not involve any direction.

c. Temperature is also a scalar quantity. It represents the average kinetic energy of particles in a substance, but it does not have a direction.

d. Energy is a scalar quantity as well. It can be transferred or transformed, but it does not have a direction.