CBSE Class 7 Answered
(i) Give two examples of periodicity observed in nature?(ii) A bike moves with a speed of 60 km/h and covers 25 km. and then with a speed of 50 km/h covers 20 km to reach the destination. What is the total time taken by the bike is to reach the destination?
Asked by Topperlearning User | 26 Jul, 2016, 04:17: PM
Expert Answer
(i) Example 1 Revolution of earth around the sun causes the change in season on a periodic basis.
Example 2 Rotation of earth around its own axis causes days and nights periodically.
(ii)
Answered by | 26 Jul, 2016, 06:17: PM
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