Close the switch would be the correct answer
It can be caused by chemical reactions like sulfur dioxide and nitrogen oxides. These can rise very high in the atmosphere. They can mix in with oxygen and rain and thats where you get your acid rain from
I hope this is helpful <span />
I think is True! Is the best answer. Because the trumpet it make them sounds like the lips with the musician and it vibrate.
20.4 years is 20.4/10.2 = 2 half-life cycles, which means a quarter of the starting mass or 15.2 g will remain after this time.
I believe it is False, only because the plane is Frictionless. Hope this helps, good luck.
