Hen an ambulance/cop car is approaching you, the siren has a high pitch because... p. s THIS IS SCIENCE

Calcium chloride +gold(1) oxide—>

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

What energy is it when you flip on a switch on a lamp