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

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?