lea has just ordered a box of "universal" litmus paper. she dips one piece into vial a, and it turns green. she dips another piece into vial b, and it turns red.
which vial, a or b, contains a greater concentration of h+ ions?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

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

The electric field inside a battery generates an electric potential difference of 12v. the plates are seperated by a distance of 0.25m. what strength of the electric field?