Consider two scenarios: 1) In standard Earth gravity a water droplet has its surface electrons stripped. It now has a mass M. An electric field is applied such that the positively charged droplet is suspended in air, with the electromagnetic attraction exactly canceling out its weight. 2) Another water droplet of mass M did not have its electrons stripped. It is electrically neutral. The same electromagnetic field does not affect it and it freely falls due to gravity. Based on this, is gravity a property of space or of matter? [SORRY - The title should have read, "Is Gravity a Property of Space, or of Matter?"]
