Physics-
General
Easy
Question
A string is wrapped round a log of wood and it is pulled with a force F as shown in the figure.Choose the correct statement(s).
I Tension T in the string decreases with increase in , II Tension
- only I is true
- both are true
- only II is true
- both are wrong
The correct answer is: only II is true
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The temperature at the bottom of a pond of depth L is 4oC. The temperature of the air, just above the layer of ice frozen at the pond’s surface is –2oC for the past many days. The thermal conductivity of ice is three times that of water. The thickness of the frozen layer of ice must be
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