Why are the holes kept at different positions of flute?

What are holes?

"In between a fixed object and a fixed screen, a convex lens can cast two images at two different positions of the lens". Taking this to be a true statement show that product of the image sizes is equal to the square of the object size.

Why is the value of g different in different places?

Why are wheels circular?

A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination, (a) Will it reach the bottom with the same speed in each case? (b) Will it take longer to roll down one plane than the other? (c) If so, which one and why?

Explain why The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heaf

Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion?