1.

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

Answer»

ANSWER:

(v)

EXPLANATION:

The SPEED of TRAIN is expressed in km/h



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