If the large piston of a hydraulic press
has an area of 500 cm (0.05 m²), what
will be the total force upon it if a pres-
sure of 100,000 pa is produced by the
small piston?

If its history of, then b) because a) implies only present day (now)

Ifound this answer online hope it

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.