what evidence would have been needed to refute the theory of gravity before it was proven to be law? helppp

Atomic nuclei of almost all elements consist of

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

An atom that has gained or lost electrons is called an _