Calculate the net force on the crate if the magnitude of the forces in the diagram are Fg=10N, Fapp= 7.5N, Ff=2.5N and Fn=10N ​

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

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?