You would use the formula for Boyle's Law:
(P1) (V1) = (P2) (V2)
(101.5) (2.0) = (P2?) (.75)
*P2 = 270kPa (You're allowed 2 significant figures)
P = Pressure
V = Volume
I think The answer to two is it would sink
You can see a physical change always but not always a chemical
0.00011811023622 <span>i</span><span>nches</span>