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Q. 4.24 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 axe
Answers (1)
(a) False:- For e.g. energy is a scalar quantity but is not conserved in inelastic collisions.
(b) False:- For example temperature can take negative values in degree Celsius.
(c) False:- Since speed is a scalar quantity but has dimensions.
(d) False:- Gravitational potential varies in space from point to point.
(e) True:- Since it doesn't have direction.
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