Which question would be the BEST to ask to determine if a wave is an EM wave or a mechanical
wave?

A. Does the wave contain-energy?
B. Does it require a medium to travel?
C. Is it a longitudinal or transverse wave?
D. Does the wave have a crest and trough?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg