Two or more substances mingled together, but not chemically combined are known as a ?

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

How hot is the suns corona? (integrated science)