When an object of mass m is raised through a vertical height Δh, the gain of its gravitational potential energy is ΔEₚ. ΔEₚ and Δh are related by the equation ΔEₚ = mgΔh, where g is the acceleration of free fall. The definition of which physical quantity is needed to derive this equation?

An old-fashioned 60 W lamp converts 95% of its energy supply into heat. A 4.0 W modern lamp has the same power output…

A small diesel engine uses a volume of 1.5 × 10⁴ cm³ of fuel per hour to produce a useful power output of 40 kW. It m…

Which statement best represents the principle of conservation of energy?

Define gravitational potential at a point.

The pressure p of an ideal gas having density ρ is given by the expression p = ⅓ ρ⟨c²⟩.

State three features of the orbit of a geostationary satellite.