Jenny bought one meter of fishing line that was rated safe for fish up to 5 lbs (22.2 N). She tied a 500 g toy on one end and started swinging it in a horizontal loop around her head. How fast would the toy have to be moving in order to snap the line?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Explain what happens at the saturation point when adding salt to water at room temperature.