mass can not be -ve. But mass can be negative in one condition,which is only hypothetical & is not applied to any of the theories......this condition is....if the speed orvelocityof a body becomes more than the speed or velocity of light(3*108 m/sec).
No. That would require a negative mass or a negative distance, neither of which is possible.
The quantity called the Gravitational constant (G) has the following dimension: [G] = L3T-2M-1 The mass exponent is "negative" ... but watch out, it only means that mass is on the denominator ... i.e. [G] = L3 / T2M
Practically nothing
In order for that to happen, one object must be positive mass and the other one must be negative mass. Negative mass has never been observed yet, so gravity has never been observed to push objects apart.
Yes, a positive relationship.
Yes, the neutron has a negative charge and a mass that is smaller than the mass of a proton.
If you compare the mass of a positron to an electron, or of a proton to an anti-proton, and so forth, the mass is the same, even though the charge is reversed. Negative charge does not mean negative mass, it has no bearing on the mass.
A electron is a subatomic particle outside the nucleus carrying a negative charge and very little mass. Other mass is negligible mass or a negative charge.
Mass and charge are not connected. Negative charge is the charge carried by an electron.
No. That would require a negative mass or a negative distance, neither of which is possible.
ambot
No measurable effect at all. The electrons which cause the negative charge have such an unbelievably small mass that billions of them cannot make any observable change to the mass.
The electrons that are missing have a negative effective mass. So the holes have a positive effective mass.
You're probably thinking of electrons, whose mass is much smaller than nucleons but also have a negative charge. Indeed, the electron has the smallest amount of mass of any particle with a negative charge.
What is the mass of a proton
Technically, it's not. It's only attractive between two positive masses or two negative masses. One positive mass and one negative mass would repel each other. It's just that we've never encountered a piece of negative mass yet.
"Antimatter" is not negative mass. Mass is a positive quantity for both matter and antimatter. So gravity is always attractive, even if one of the masses in the relationship happens to be antimatter. If such a thing as negative mass exists, then the forces between it and a lump of normal mass would be repulsive ones. Antimatter is observed routinely, but no evidence of negative mass has ever been observed. When matter & antimatter annihilate energy is released per E = mc2 where m corresponds to the sum of their masses. If the antimatter had negative mass then instead of a positron/electron annihilation releasing energy corresponding to twice the electron mass (as it does) the mass of the electron and negative mass of the positron would cancel resulting in no energy release (this does not happen). This proves that both matter & antimatter have positive mass, without even referring to gravity. As they both have positive mass their gravity will be attractive not repulsive.