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Q3.21: NCERT Physics - Part 1 MOTION IN A PLANE 3.21 Solution: Read each statement below carefully and state, with reasons and …
Read each statement below 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 value for observers with different orientations of axes.
Step-by-Step Verified Solution
**Answer:** (a) False. (b) False. (c) False. (d) False. (e) True.
**Step-by-Step Explanation:**
(a) Energy is scalar but not conserved in inelastic collisions.
(b) Temperature is scalar but can be negative.
(c) Path length is scalar but has dimensions.
(d) Gravitational potential is scalar but varies in space.
(e) True. Scalar values are independent of axis orientation. [citation:5][citation:17]
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