A model car travels at a constant velocity of 12 ms⁻¹ in a straight horizontal line. The input power to the engine of the car is 800 W. The efficiency of the engine is 60%. What is the total horizontal resistive force on the car?

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.