What happens in a cold front? a. a cold air mass catches up to a moving warm air mass, sliding over it. b. a warm air mass becomes a cold air mass as it moves. c. a warm air mass collides with a stationary cold air mass, and slides under it. d. a cold air mass comes in under a warm air mass.

Bradley was working in the lab. he accidentally poured a container of concentrated hydrochloric acid into his container of distilled water. not thinking much of it, he continued with his work as if nothing happened. which of these would be the result of this laboratory accident? a) the water will change to a bright pink color. b) the new solution would decrease in temperature. c) the solution has now become a good conductor of electricity. d) hcl and water have the same chemical and physical properties, so nothing would happen.