In which model are atoms imagined as the solar system

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?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?