What is the normal force acting on a 70-kg person riding a drop tower when they are falling at an acceleration of 9.8 m/s^2

A glance at the night sky above Earth shows that some stars are much brighter than others. Apparent brightness is how we see the star's brightness from Earth. The absolute brightness is what a star would look like if there was a standard distance that we were looking at all of the stars from.

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