Atorque of 50 n*m acts on a wheel of moment of inertia 25 kg*m^2 for 4 s and then is removed.
b)how many revolutions does it make in 15 s if it starts at rest?
i found the angular acceleration, 2 rad/s^2, but i don't know how to find the amount of revolutions.

It is really hard for me right know

The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)