Question

1) standard measure of a physical quantity is a a) number b) standard unit c) constant d)variable 2) the number of fundamental physical quantities is a) 2 b) 4 c) 6 d) 7 3) write the relation between P,N and U​

Answer 1

Answer:

HEY MATE HERE IS YOUR ANSWER

Answer 2

Answer:

1) unit

2)7

3)In physics, the energy–momentum relation, or relativistic dispersion relation, is the relativistic equation relating any object's rest (intrinsic) mass, total energy, and momentum:

{\displaystyle E^{2}=(pc)^{2}+\left(m_{0}c^{2}\right)^{2}\,}{\displaystyle E^{2}=(pc)^{2}+\left(m_{0}c^{2}\right)^{2}\,}

(1)

holds for a system, such as a particle or macroscopic body, having intrinsic rest mass m0, total energy E, and a momentum of magnitude p, where the constant c is the speed of light, assuming the special relativity case of flat spacetime.[1][2][3]

The Dirac sea model, which was used to predict the existence of antimatter, is closely related to the energy-momentum equation.