If the space rocket has a mass of 30,000 kg, how
much does it weigh?

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

B. nuclear reactions could first occur.

Ansa leaf changing color in autumn;