Bromine vapour is heavier than air. even so it's spreads upwards in the experiment above. Why?

Astate of matter all that has define volume and can flow is a(n)

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

J. j. thomson’s experiment disproved the theory that an atom