Physics
If lift is going up with acceleration, the apparent weight of a body is

May be more or less than true weight
More than the true weight
Less than the true weight
Equal to the true weight

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Physics
Stationary wave is formed by

Two waves of same frequency travelling in the same direction
A transverse wave superposing a longitudinal wave
Two waves of same frequency travelling in the opposite direction
Two waves of the same speed superposing

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