A2 meters tall person is located 5 meters from a camera lens (camera lens are convex lenses). the lens has a focal length of 35 millimeters. do not forget to convert millimeters to meters before subbing into the equation. find the distance where the image would appear.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

The energy equivalent of the rest mass of an electron is