What is true for all of the examples of electromagnetic waves? a) they all move at the same speed in a vacuum. b) they all have the same wavelength. c) they all have the same frequency. d) they all have the same energy.

A statement that is true for ALL of the examples of electromagnetic waves is that;

A) They all move at the same speed in a vacuum

The reason for qualifying 'in vacuum' is because EM waves of different frequencies often propagate at different speeds through material. Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum.

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)