A bob on a pendulum has a mass of 0.500 kg. It has 1.50 joules of energy at its maximum angle of displacement. What is its speed when it passes through the lowest point in its swing?​

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Is a copper wire a conductor or insulator?