Explain why Earth is not a perfect sphere? Earth surfaces are not all the same.'
Earth's surface is smooth.
The Earth's shape bulges in the equator.
The Earth's atmosphere has affected its shape.

Which statement correctly describes the relationship between frequency and wavelength?

The two required components for a generator

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?