Ali decided to do an experiment on three identical apples found on three different shelves, A, B, and C as shown in the image. Taking ground as a reference level, the gravitational potential energy at shelf A is 10 J. What would be the gravitational potential energy at shelf B if it has double the height of shelf A from the ground?

What causes the formation of ocean currents?

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

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