The Young Modulus of a metal wire is 0.17 TPa and it's cross-sectional area is .18mm^2. The wire is extended by a force (F). This causes the length of the wire to be increased by 0.095%. What is the amount of stress and the amount of force in this wire?

The Young Modulus of a metal wire is 0.17 TPa and it’s cross-sectional area is .18mm^2. The wire is extended by a force (F). This causes the length of the wire to be increased by 0.095%. What is the amount of stress and the amount of force in this wire?
suppose a speck of dust in an electrostatic precipitator has 1.0000×10^12 protons in it and has a net charge of -5.00nC (nanocoulomb). How many electrons does it have?