A dentist's drill starts from rest. After 3.30 s of constant angular acceleration, it turns at a rate of 2.53 104 rev/min. Required:
a. Find the drill's angular acceleration.
b. Determine the angle (in radians) through which the drill rotates during this period.

Both independent and dependent clauses

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.

If you let go of the notebook after lifting it, will it move? how?