Question

(a) State one limitation of solar energy available from solar cells.
(b) What is the minimum wind velocity required to obtain useful energy with a windmill?
(c) Define the term ‘nuclear fission’.

Answer 1

(a)

One limitation would be that the efficiency of the process is very low, around 15%-20%.

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(b)

The minimum speed required is from 3-5 m/s.