A turntable rotates with a constant $2\mathrm{.}05$ rad$/$s$2$ clockwise angular acceleration. After $4\mathrm{.}00$ s it has rotated through a clockwise angle of $30\mathrm{.}0$ rad $.$

What was the angular velocity of the wheel at the beginning of the $4\mathrm{.}00$ s interval? Express your answer in radians per second

Find the mass of one nucleus of the unknown element. Express your answer in terms of the proton mass m $.$ Express your answer as a multiple of m