Basis for all living things; every living thing contains this element

In which chemical equation, which symbol should be used to indicate that substance is in solution?

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

Non renewable resources like petroleum eventually