Which of the following is the closest to the observed abundance of 71ga, one of two stable gallium isotopes (69ga and 71ga). the answer in the book shows 40%, and i have absolutely no idea how to solve this. !

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.