A car of mass 1000kg is driven from its initial state with uniform
acceleration and reaches a speed of
30km/h in 10sec. Find: (i) force
exerted by the engine (ii) the power
in kilowatts (kw).

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

Which accurately compares concave and convex lenses?

What is the speed of an object at a given moment?