Work, Energy and Power — Physics STD 11 — Question

The velocity with which a projectile must be fired so that it escapes Earth’s gravitational does not depend on ……..

The work done per unit time in rotational motion is given by –

Density of water is maximum at the temperature of

The equation of a wave is y = 0.1 sin (100πt – kx) where x, y are in metres and t in seconds. If – the velocity of the wave is 100 m/s, then the value of k is

The vector product of any two vectors gives a –

The angle between any two orthogonal unit vectors is –

The ratio of intensities of two waves is 16 : 9. If they produce interference, then the ratio of maximum and minium intensities will be ……..

One horse power (1 hp) is

A particle at rest starts moving in a horizontal straight line with uniform acceleration. The ratio of the distance covered during the fourth and the third second is –