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A person of mass 50kg climbs a tower of height 72 metres. Calculate the work done. (8 = 9.8ms-2)
Explain advantages of irrigation.
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]
An echo returned in 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342ms−1?
The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?