Physics
An aircraft can perform aerobatic manoeuvres in a vertical loop because of

Centripetal force
Weight
Gravity
Centrifugal force

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Can be of any shape
Should be made of a good conductor like copper with sharp-pointed edges
Should be in the form of a vertical rod
Should be made of a good conductor but can be of any shape

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Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

at sea level
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at a place in a valley below sea level
at the top of Mt. Everest

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