How do you calculate the abundance of an atom and the relative atomic maths? as simply as possible?

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

In apex! a liquid heated beyond a certain temperature becomes

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles