The depth to which an inverted drinking glass must be pushed beneath the water surface to squeeze the enclosed air to half its volume is
A)76 cm.
B)10.3 m.
C)14.7 m.
D)20.6 m.
E)29.4 m.

Question

Quizplus · Accepted Answer

According to Boyle's Law, pressure and volume are inversely proportional. To compress the air to half its volume, the pressure must double. At 10.3 m depth, the water pressure is equal to atmospheric pressure, thus doubling the pressure on the air inside the glass.

The Depth to Which an Inverted Drinking Glass Must Be