Which one of the following is not a form of stored energy?

The motion of a car along a straight path is shown by the following figure

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The car starts from O and reaches A, B and C at different instants of time. During its motion from O to C and back to B, the distance covered and the magnitude of the displacement are respectively

Water boils at a lower temperature at high altitudes, because

Concave mirror is used in headlights of vehicles, because it