A hypothesis is confirmed when a. one experiment proves the hypothesis b. many experiments validate the hypothesis c. you think your hypothesis is correct

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

the link still does not work even when adding it to the url bar

explanation:

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter