Acrack across rock layers caused by moving plates is called?

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

What caused magnetic fields? what happens if you keep breaking a magnet in two until you reach a single atom?

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength