Weight and mass are used synonymously on earth because the value of g is constant on the earth because the weight of a body is the amount of force exerted by the Earths gravity on an object of finite mass. And, the mass of an object gives the amount of matter in the body and is measured in kilograms.
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<h3><u>Minimum uncertainty in the vertical component of the momentum of each photon:</u></h3>
According to Heisenberg's Uncertainty principle, both the “position and velocity of the particle” cannot be measured exactly at the same time. The momentum of the particle equals the product of its mass and velocity. And it can be inferred that the “product of the uncertainties” in the “momentum and the position” of a particle equals
.
Immediately after the photon has passed through the slit, given particle has a momentum uncertainty of
and its position uncertainty is
, then the minimum uncertainty in its momentum will be

That my good sir would be an ecosystem
Force is mass into acceleration
and pressure is force applied per unit area.