1991
A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air
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1991 NECO SSCE Physics Past Questions
1991
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant
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1991
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant.
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1991
A man standing 510m away from a wall sounds a whistle. The echo from the wall reaches him 3s later. Calculate the velocity of sound in air.
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