A fast pitch softball player does a "windmill" pitch moving her hand through a vertical circular arc to pitch a ball at 71mph. The 0.20 kg ball is 53 cm from the pivot point at her shoulder. Just before the ball leaves her hand, what is its centripetal acceleration?

What type of nuclear decay causes the atomic number of an element to increase by 1?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

(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