The force experienced by an electron in a field between parallel plates is proportional to which of the following?

Which notation is used to represent an alpha particle? a. b. c. d.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

If a star is moving toward earth, it is