An electric heater is ________ efficient because all of the electrical energy supplied is transferred to thermal energy.

The mass of the canoeist is 65kg. Calculate her kinetic energy when travelling on still water at 2.5 m/s.

If an object is being under certain stress which is beyond its elastic limit, it will _______ when the stress is removed.

In calculating torque, only components of forces _________ the lever arm are considered.

Modulus of elasticity is the ratio of _________.

The first condition of equilibrium of a body is _________.

Fluid motion characterized by chaotic changes in pressure and flow velocity is called__________.

The deformation per unit length is called__________.

Removing the excess water by spin drying clothes in a washing machine is with the help of __________.

Centripetal force and centrifugal force have the same ___(a)___ and opposite ___(b)___.