Can someone explain how waves form?

A wave travels at speed 34 cm/s. its wavelength is 18 cm. what is the period of the wave

What is the intensity, in terms of i0, if a lens defocuses the laser beam to 10 times its initial diameter?

What is diffraction patterns? What is diffraction angles?

James decides to walk home from school today. He lives 3 miles from school and can walk home in 45 minutes. At what rate is James traveling? A) 1 mile/10 minutes B) 1 mile/15 minutes C) 1 mile/20 minutes D) 1 mile/30 minutes

Joe is holding a book over his head. Is he preforming work? why?

How would you convince somebody that the momentum of an isolated system is constant?

Object A has a charge q on it, object B has a charge q on it, and Object C has a charge 2q on it. These charges are arranged, one each, at the vertices of an equilateral triangle. Which charge has the greatest magnitude electric force on it? a. Ab.

How can Newton's laws be used when addressing the motion of objects?

A plastic rod rubbed with a duster attracts bits of paper becauseof a what force

What is the particle that an atom can lose or gain in order to form a charged ion