A solid weighs 45N and 15N respectively in air and water. Determine the relative density of the solid
A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 340ms\(^-1\), how far is he from the hill?
The critical angle for light traveling from a transparent medium to air s measured as 34º. The refractive index of the medium is
The general definition of elastic modulus is
