Question

How mass of a sub atomic particle varies with respect to (i) ALTITUDE and (ii) SPEED?

Answer 1

Part 1 :- There is no change of mass of sub atomic particle with altitude

Let us take an example a proton would be of same mass weather you measure it at your home or at the peak of mount everest

part 2 :- mass of sub atomic particle increases with increase in speed, as you increase the speed of sub atomic particle its mass will start to increase .

The mass will increase according to Einstein relativistic formula

M = Mo/{1- (v/c)^2}^1/2

M is mass at speed v

Mo is the rest mass that is mass of particle at rest

V is the speed with which particle is moving

C is the speed of light