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13. A wave takes o.25 second to complete four cycles. What is the wave's frequency and Period? 14. A wave takes 10 seconds to complete two complete cycles. (a) How long does it take to complete one cycle? (b) What is its period? (c) What is its frequency? 15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity?

13. A wave takes o.25 second to complete four cycles. What is the wave's frequency and Period? 14. A wave takes 10 seconds to complete two complete cycles. (a) How long does it take to complete one cycle? (b) What is its period? (c) What is its frequency? 15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity?

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6:45 9 Untitled document (75).pdf 13. A wave takes o.25 second to complete four cycles. What is the wave's frequency and Period? 14. A wave takes 10 seconds to complete two complete cycles. (a) How long does it take to complete one cycle? (b) What is its period? (c) What is its frequency? 15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity? 16. Two sailboats are anchored 12 m apart. As a series of waves passes, the boats bob up and down but when one is up, the other s always down. What wavelength could produce this effect? 17. As a sailor on one of the boat in problem #16, you notice that you go from the highest position to the lowest position and back to the highest in 4 seconds. (a) What was the period of the wave? (b) What was the frequency? (c)) What was its velocity? (Hint: you need to use your answer from problem # 16) 18. The laser in a compact disk (CD) player uses light with a wavelength of 780 nm. What is the frequency of this light? (Hint: convert nanometers to meters; 1m = 10'nm . 19. NPR (National Public Radio) broadcasts at 89.3 MHz (or 89300000 Hz). Radio waves travel at the speed of light, which is 3X 10" m/s . What is the wavelength that NPR uses to broadcast its news? 20. What is the energy of an ultraviolet photon having a wavelength of 1. 18 X 10 m? (Hint 1: first usec = f, where c = 3 X 10°m/s, to find the frequency). (Hint 2: then substitute the value of frequency in E = hf, where h = 6. 626X10".s
Transcribed Image Text:6:45 9 Untitled document (75).pdf 13. A wave takes o.25 second to complete four cycles. What is the wave's frequency and Period? 14. A wave takes 10 seconds to complete two complete cycles. (a) How long does it take to complete one cycle? (b) What is its period? (c) What is its frequency? 15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity? 16. Two sailboats are anchored 12 m apart. As a series of waves passes, the boats bob up and down but when one is up, the other s always down. What wavelength could produce this effect? 17. As a sailor on one of the boat in problem #16, you notice that you go from the highest position to the lowest position and back to the highest in 4 seconds. (a) What was the period of the wave? (b) What was the frequency? (c)) What was its velocity? (Hint: you need to use your answer from problem # 16) 18. The laser in a compact disk (CD) player uses light with a wavelength of 780 nm. What is the frequency of this light? (Hint: convert nanometers to meters; 1m = 10'nm . 19. NPR (National Public Radio) broadcasts at 89.3 MHz (or 89300000 Hz). Radio waves travel at the speed of light, which is 3X 10" m/s . What is the wavelength that NPR uses to broadcast its news? 20. What is the energy of an ultraviolet photon having a wavelength of 1. 18 X 10 m? (Hint 1: first usec = f, where c = 3 X 10°m/s, to find the frequency). (Hint 2: then substitute the value of frequency in E = hf, where h = 6. 626X10".s
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