What are the differences and similarities between xrays and radio rays ?

What is magnetic flux? explain faraday's law of induction.

A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

What are atoms of the same element with varying number of neutrons