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P6 The wave model of radiation

P6 The wave model of radiation. P6.1 What are waves? . Objectives:. P6.1 What are waves? . Can you describe the difference between these two waves?. P6.1 What are waves? . P6.1 What are waves? . http:// www.science-animations.com/support-files/slinkyc.swf. P6.1 What are waves? .

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P6 The wave model of radiation

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  1. P6 The wave model of radiation

  2. P6.1 What are waves? Objectives:

  3. P6.1 What are waves? Can you describe the difference between these two waves?

  4. P6.1 What are waves?

  5. P6.1 What are waves? http://www.science-animations.com/support-files/slinkyc.swf

  6. P6.1 What are waves?

  7. P6.1 What are waves?

  8. P6.1 What are waves? wave speed = frequency × wavelength What are the units?

  9. P6.1 What are waves? Try these questions: Bill counts 5 waves on a pond in 10 s. The distance between them is 80 cm. What is their speed? 5 waves in 10 s. Distance between is 80 cm. Speed? frequency = 5/10 = 0·5 Hz. speed = frequency × wavelength = 0·5 × 80 = 40 cm/s Lizireads the back label of her microwave oven. It says frequency = 2,450 MHz. The speed of microwaves is 3.00×108 m/s. What wavelength are they? frequency = 2,450 MHz. speed = 3.00×108 m/s. speed = frequency × wavelength 3.00×108= 2,450×106 × wavelength wavelength= 3.00×108 ÷ 2,450×106 = 0·122 m = 12·2 cm 3. Paul plays a note of wavelength 25 cm on his synthesiser. He knows the speed of sound is 340 m/s in air. What is its frequency? wavelength= 25 cm = 0·25 m. Speed = 340 m/s speed = frequency × wavelength 340 = frequency × 0·25 frequency = 340 ÷ 0·25 = 1,360 Hz

  10. P6.1 What are waves?

  11. P6.1 What are waves? http://www.physicsclassroom.com/class/waves/u10l2e.cfm

  12. P6.1 What are waves? • 1. The time required for the sound waves (v = 340 m/s) to travel from the tuning fork to point A is ____ . • 2. Two waves are traveling through the same container of nitrogen gas. Wave A has a wavelength of 1.5 m. Wave B has a wavelength of 4.5 m. The speed of wave B must be ________ the speed of wave A. .

  13. P6.1 What are waves? 3. TRUEor FALSE: Doubling the frequency of a wave source doubles the speed of the waves. 4. While hiking through a canyon, Noah Formula lets out a scream. An echo (reflection of the scream off a nearby canyon wall) is heard 0.82 seconds after the scream. The speed of the sound wave in air is 342 m/s. Calculate the distance from Noah to the nearby canyon wall. GIVEN: v = 342 m/s, t = 0.82 s (2-way) Find d (1-way) If it takes 0.82 s to travel to the canyon wall and back (a down-and-back time), then it takes 0.41 s to travel the one-way distance to the wall. Now use d = v • t d = v • t = (342 m/s) • (0.41 s) = 140 m

  14. P6.1 What are waves?

  15. P4 Explaining motion P4.2 What are forces? Great work year 11, see you all Monday. Period 2 & 3 in room 320

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