A current of 88.9 mA exists in a metal wire. How many electrons flow past a given crosssection of the wire in 9.12 min? The fundamental charge is 1.602 × 10−19 C. Answer in units of electrons.

what type of charge does it have? negative

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.