(Solved): An alpha-particle has a mass of \( 6.64 \times 10^{-27} \mathrm{~kg} \) and a charge of \( 3.2 \tim ...

An alpha-particle has a mass of \( 6.64 \times 10^{-27} \mathrm{~kg} \) and a charge of \( 3.2 \times 10^{-19} \mathrm{C} \). It is travelling in a circular path of radius \( 25 \mathrm{~cm} \) in a uniform magnetic field of magnitude \( 1.5 \mathrm{~T} \). What is the speed of the particle?