How many protons, neutrons and electrons in a neutral atom with the symbol 41ca

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?

What is the frequency if a wave that pases a given pount 22 times in 2 seconds