Question
Where does a pendulum have maximum
- potential energy?
- kinetic energy?
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Explain the various factors which are responsible for the loss of stored food grains.
What are infrasonic waves? Name two animals which produce infrasonic waves.
Explain why a legume crop does not require nitrogenous fertilizers?
The troops (soldiers) equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing?

What effects does the increasing organic waste have on the dissolved oxygen content and biochemical oxygen demand of water?