Waves — Physics STD 11 Science — Question

A monkey climbs up a slippery pole for 3 seconds and subsequently slips for 3 seconds. Its velocity at time t is given by v(t) = 2t(3 - t); 0 < t < 3 and v(t) = -(t - 3)(6 - t) for 3 < t < 6s in m/s. It repeats this cycle till it reaches the height of 20m.
At what time is its acceleration maximum in magnitude?

State the number of significant figures in the following:

0.2370g cm^-3

Explain why (or how):
Solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases,

Why do stationary waves not transport energy?

A thief jumps from the roof of a house with a box of weight on his head. What will be the weight of the box as experienced by the thief during jump?

When a shaving brush is taken out of water its hairs cling together. Why?

Two boys on ice skates hold a rope between them. One boy is much heavier than the other. Discuss their motion when one of the boys pulls on the rope.

Which type of strain is there, when a spiral spring is stretched by a force?

What is the bulk modulus of a perfectly rigid body?