Is the gravity of the sun and moon pull earth's surface in the same direction neap or spring

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

What happens when a rubber rod is rubbed with a piece of fur?

Suppose a piece of dust finds itself on a cd. if the spin rate of the cd is 355 rpm, and the piece of dust is 4.5 cm from the center, what is the total distance (in m) traveled by the dust in 8 minutes? (ignore accelerations due to getting the cd rotating.) m