What are examples of devices that use electromagnetic waves? Check all that apply. FM radios
microwaves
TV remote controls
alarm clocks
X-rays

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

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.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?