Q.

The working principle of a 'Washing machine' is :

A. centrifugation
B. dialysis
C. reverse osmosis
D. diffusion
Answer» A. centrifugation
Explanation: The principle behind the spinning dry of the clothes in a washing machine is centrifugal force. The fast spinning around of the clothes in the drum creates a large centrifical force from center to the edge of the drum, and the wet clothes are flung outwards to the drum edge and the water escapes through the drum holes.
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