It would be easier to pull the evacuated Magdeburg hemispheres apart if they were
A)held upside down.
B)at sea level.
C)20 km beneath the ocean surface.
D)20 km above the ocean surface.
E)none of the above

Question

Quizplus · Accepted Answer

The pressure outside the hemispheres decreases with altitude, so at 20 km above the surface, the atmospheric pressure is much lower, making it easier to pull the hemispheres apart due to the reduced external pressure.

It Would Be Easier to Pull the Evacuated Magdeburg Hemispheres