a metre scale is place along the axis of a convex mirror of focal length25cm it's nearer and being at a distance of 50cm. calculate the size of image formed

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Which is the most accurate name for the ionic compound cas?

How do you know how many valence electrons an atom has?