Oersted discovered a connection between electricity and magnetism when he observed:
A. the motion of a compass needle.
B. a light flickering.
C. a current-carrying wire heating up.
D. a current-carrying wire vibrating.

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate