Question

2. Which of the following are not correct?

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.
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Answer 1

Answer:

(i) true

(ii) true . not sure about this answer

(iii) true

(iv) dont know

(v) false it is expressed in km/h

Explanation:

Answer 2

Answer:

The basic unit of time is second – Correct

(ii) Every object moves with a constant speed - Not correct

(iii) Distances between two cities are measured in kilometers – Correct

(iv) The time period of a given pendulum is not constant - Not correct

(v) The speed of a train is expressed in m/h - Not correct

Explanation:

Áyúśh.