A person notices a mild shock if the current along a path through the thumb and index
finger exceeds 81 µA.
A. Find the maximum allowable potential difference without shock across the thumb and index finger for a dry-skin resistance of 5.4 × 105 Ω. Answer in units of V.
B. Find the maximum allowable potential difference without shock across the thumb and index finger for a wet-skin resistance of 2100 Ω. Answer in units of V.

probably not if net force is zero

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.