The speed of a car increases from 10 m s⁻¹ to 15 m s⁻¹ and its kinetic energy increases by E₁. Later, the speed of the car increases from 15 m s⁻¹ to 25 m s⁻¹ and its kinetic energy increases by E₂. What is the ratio E₂/E₁?

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.