Yes. If the masses are the same, then it can be considered as a constant and thus neglected.
Sometimes-when there masses are equal.
Other things being equal, yes; in general, no. The mass also depends on the density.
in a gravity field it can find 2 equal masses
NO
No
Equal masses will have equal inertia.
Sometimes-when there masses are equal.
Protons and neutrons have relatively equal masses. Electrons have a much smaller mass than the others.
yes
Their masses are equal. It's their charges that are opposite.
different equal
both masses have the same speed. The acceleration of objects in freefall is independent of mass, resulting in the same speed at the end of a fall. The momentum and energy are proportional to the mass.
in a gravity field it can find 2 equal masses
in a gravity field it can find 2 equal masses
No, number of electron is not equal to the number of neutron ,as we can predict it from the difference of their masses only,
Other things being equal, yes; in general, no. The mass also depends on the density.
The equal-area projection shows size of various land masses.