University:
Campbell University
Course:
PHYS 222 | General Physics II
Academic year:

2021
Views:

98

Pages:

3
Author:

lhuseroha

KEY Waves Practice 1.) The period of a tuning fork is 0.136 . What is its frequency? Answer - 7.35 . 2a.) If a pendulum oscillates thirty-two times in two minutes, what is its frequency? Answer - 16 b.) what is the period? 0.267 0.267 Answer - 3.75 . 3.) The figure below shows a water wave. Crest Trough a.) With arrows, show the direction of motion of a marker placed at each letter. b.) Which pair of points are in phase? c.) Measure the wavelength in centimetres. Answer – A and E or B and F etc. d.) Label a crest and a trough. 4.) A vibrating paddle in a ripple tank, vibrates with a frequency of 3 and an amplitude of 2.5 . The resulting waves travel away from the source with the speed of 5.7 , passing under various markers for the water. a.) At what frequency do the markers oscillate? Answer - . 3 b.) If the frequency of this source is changed to 4.5 , what will happen to the speed of the waves and the frequency of the markers oscillation? Answer - . 4.5 . 1 KEY 5.) The wave created by a stone dropped into a pool of water decreases in amplitude as they radiate out from the source. Why? Answer . 6.) A pond is 12 . across. The crest of two successive waves are 60.0 apart and they move across the pond in 15 . a.) What is the velocity of the waves? ∆ Answer - 0.80 b.) What is the frequency of the waves? Answer - 0.80 0.60 1.3 c.) What is the period of the waves? Answer - 1.3333 7.) A swing has a frequency of 0.20 0.77 . . Its amplitude is of 1.2 . What is the total distance travelled in one minute? Answer - 0.2 0.2 12 . 1 1 5 , . 2.4 28.8 . 8.) The period of some ocean waves is 2.7 . a.) How many wave crests will hit the boat in 2.5 Answer - . . 55.5 b.) If these waves travel at a speed of 1.3 , what is their wavelength? Answer - 1.3 . 3.51 2 c.) If the waves slowdown to 0.90 i.) What is their wavelength? KEY near the shore, Answer - 0.90 2.43 . ii.) By how much has their frequency changed? Answer - 0.37 . iii.) How many wave crests will hit the shore in 2.5 Answer - ? 2.43 0.37 0.90 9.) The figure below shows straight incident waves approaching a barrier. Normal a.) With a protractor, measure the angle of incidence and record? Answer - 58° b.) Draw in the reflected waves, showing that each reflected wav joins up with the corresponding incident wave at the barrier, and record the angle of reflection. Answer - 58° 3

Waves Practice

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