Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm from one source and 15 cm from the other. What wave heights do you expect at point X? A. The waves will never get very high or low. B. The waves may get very high, but will never get very low. C. The waves may get very low, but will never get very high. D. The waves will sometimes get very high and very low.

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

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

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