Question

Which one of the following statements is true?

• A. A scalar quantity is the one that is conserved in a process
• B. A scalar quantity is the one that can never take negative values
• C. A scalar quantity is the one that does not vary from one point to another in space
• D. A scalar quantity has the same value for observers

Answer 1

Answer: (D)

A scalar quantity has the same value for observers

Answer 2

(1) The statement is false, It is because energy (scalar quantity) is not conserved during inelastic collision.

(2) The statement is false, It is because the temperature (scalar quantity) can be negative.

(3) The statement is false. It is because gravitational potential energy (scalar quantity) vary from point to point to point in space.

(4) The statement is true because the value of scalar does not change with orientation of axes.