The binding energy of a hydrogen atom represents the energy needed to remove the electron from the nucleus. It is given by the following formula: \[ E_b = -13.6 \, {eV} \]
Calculate the change in angular momentum of an electron when it jumps from the third orbit to the first orbit in a hydrogen atom.
Derive an expression for maximum speed of a vehicle moving along a horizontal circular track.
If the mean and variance of a binomial distribution are \( 18 \) and \( 12 \) respectively, then the value of \( n \) is __________.