A0.90 kg rock is attached to a 0.35 m rope and spun in a vertical circle. the tension on the rope when the rock is at the top of the swing is 76.0 n [down]. what is the speed of the rock?

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)