Mac mixed 24g of substance a and 12g of substance b to form 10g of substance c and a certain amount of substance d. which statement is correct?

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

Light waves can move through , but they travel fastest when they move through a(n) .

What are several ways to reduce the effect of friction