The sensation of sound persists in our brain for about

1. 0.001 s
2. 0.2 s
3. 0.1 s
4. 10 s

Sound energy passing per second through a unit area held perpendicular it is called

1. intensity
2. frequency
3. amplitude
4. quality

When angle of incidence is more, then

1. lateral displacement is less
2. lateral displacement is more
3. lateral displacement is independent of incidence angle
4. zero

A pendulum is oscillating on either side of its rest position. The correct statement is

1. It has only the kinetic energy at its each position.
2. It has maximum kinetic energy at its extreme position.
3. It has the maximum potential energy at its mean position.
4. The sum of its kinetic energy and potential energy remain constant throughout the motion.