Two simple pendulums of equal lengthcross each other at mean position. What is their phase difference?

A simple pendulum moves from one end to the other in 1/2 second. What is the frequency?

Consider a pair of identical pendulums, which oscillate with equal amplitude independently such that when one pendulum is at its extreme position making angle of 2^@ to the right with the vertical, the other pendulum makes and angle of 1^@ to the left of the vertical. What is the phase difference between the pendulums?

A simple pendulum takes 32s to complete 20 oscillations. What is the time period of the pendulum?

What do you mean by position isomers?

What is the relation between path difference and phase difference?

what do you mean by ortho position ?

Two different line when intersect each other at some point,they are called?

What is the distance between the two points which have a phase difference of 2pi ?