A thin spherical shell of a 4.0 cm radius has a charge uniformly distributed on its surface. If the magnitude of the electric field at a point 10 cm radially outward from the center of the shell is 850 N/C, what is the surface charge density

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

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?

Element with 3protons and 5neutrons