Physics

A compass, which is used to assist in navigation, is an instrument that shows magnetic north. You must apply a correction to determine the direction of true north. The ability to steer a boat by a compass is useful if land is out of sight, visibility is reduced, or the boat operator is disoriented._x000D_ Mount a boat compass away from iron, magnets, and electrical wiring and equipment.

Moment of inertia and moment of a force does not have identical dimension.

Proton has a positive charge.

Short waves are more energetic than long waves. Short waves are unaffected by atmospheric disturbances. By convention, short waves are meant for long distances whereas long waves are reserved for short distances.

Both when accelerated through a potential difference of 100 kV, they will have the same energy. The mass of the electron is less than the mass of a proton, hence it will move faster(momentum).