.a diffraction grating has exactly 5000 lines per centimeter .helium laser of wavelength 633nm is incident on the grating. a) if the diffraction grating is cut into two similar lengths ,find the angle of the first maxima in this case .​

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.