When a known standard resistor of 2.0 is connected to the 0.0cm end of a metre bridge, the balance point is found to be at 55.0cm

A resistor connected to a 12V battery draws a current of 2A. The energy dispatched in the resistor in 5 minutes is ___.

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