Question
Diffusion of gases in water is essential. Explain the term with suitable example.
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On what factors does the gravitational potential energy of a body depend?
A boy weighing 50kg climbs up a vertical height of 100m. Calculate the amount of work done by him. How much potential energy does he gain? (8 = 9.8m/s2).
Give one example each of a body possessing: (i) kinetic energy, and (ii) potential energy.
Two children A and B weigh the same and start climbing up a rope separately up to a height 8m. If A takes 15s while B takes 20s to accomplish the task, who has more power and why?###State and define S.I. unit of power. Two children A and B both weighing 32kg start climbing up a rope separately reach a height of 8m, 'A' takes 15s and 'B' takes 20s to reach the level calculate the amount of work done by A and B. which of the two has more power. show by calculate. [g = 10m/ s2]
What is medullary sheath? Mention its significance.