Question

24. Read each of the following statements carefully and state,
with reasons and examples, if it is true or false?

☯A scalar quantity is one that

(a) is conserved in a process.
(b) can never take negative values.
(c) must be dimensionless.
(d) does not vary from one point to another in space.
(e) has the same values for observers with different orientations of axes.
​

Answer 1

Solution

(a) False, because several scalar quantities do not remain conserve in a process. For example, energy being a scalar quantity is not conserved in an inelastic collision.

(b) False, because few scalar quantities can take negative values. For example, temperature being a scalar quantity can take negative values such as -10°C, -33°C etc.

(c) False, because several scalar quantities have dimensions. For example, mass, density, speed and pressure etc. all have dimensions.

(d) False, because few scalar quantities vary from one point to another point in space. For example, density, temperature, charge density etc. vary from one point to another point in space.

(e) True, as orientation of axes does not change the value of a scalar quantity. For example, mass, density etc. are independent of the orientation of axes.

Answer 2

Answer:

e ia the true answer.

Explanation:

thanks to my answer.