Aconcave mirror forms the image of a very distant object at 18.0 cm on the same side of its reflecting surface. what is the focal length of this mirror? (a) + 36.0 cm (b) + 18.0 cm (c) - 18.0 cm (d) - 36.0 cm

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

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