Light from a laser strikes a diffraction grating that has 5 314 grooves per centimeter. the central and first-order principal maxima are separated by 0.488 m on a wall 1.78 m from the grating. determine the wavelength of the laser light. (in this problem, assume that the light is incident normally on the gratings.)

Calculate the kinetic energy of earth due to its spinning about its axis. krot = j compare your answer with the kinetic energy of the orbital motion of earth's center of mass about the sun. assume earth to be a homogeneous sphere of mass 6.00 1024 kg and radius 6.40 106 m. the radius of earth's orbit is 1.50 1011 m.

Which atomic model was proposed as a result of j. j. thomson’s work?

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.