A cyclist rides 4 km East and then she turns around and rides 7 km West. Assume East is the positive direction. what is the displacement for her first trip

Give an example in which the electrical energy changes to light energy

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop