Question

2. Which of the following are not correct?
(1) The basic unit of time is second.
(ii) Every object moves with a constant speed. -
(111) Distances between two cities are measured in kilometers.-
(iv) The time period of a given pendulum is not constant
(v) The speed of a train is expressed in m/h. ---​

Answer 1

Answer:

V is not correct

Explanation:

The speed of a train is expressed in km/h.

Answer 2

Answer:

(ii), (iv) & (v).

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