Because without the knowledge of energy a chemist can not predict either the specific chemical reaction is possible or not, he can also predict that which fuel is better for a specific Vachel and several other factors may be predicted.
Chemist
A Biochemist might study how energy is used in athletes during competition since they study chemical processes, and reactions in living organisms.
they study chemicals
Chemistry.
A scientist, or just a chemist.
chemist
utan munggos singko takos
This is a chemist.
a chemist
utan munggos singko takos
utan munggos singko takos
They study chemicals and see how they react to certain situations.=