Question

Q 16. It requires 20 turns of the stem of a watch to wind the main spring and this stores sufficient energy to
keep the watch running for 30 h. If 10 turns are given to the stem, the watch will run for :
(a) 20 h
(b) 15 h
(c) 7.5 h
(d) 3.75 h​

Answer 1

Answer:

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