XAVIER CATHOLIC COLLEGE PHYSICS MEDICAL PHYSICS
XAVIER CATHOLIC COLLEGE
PHYSICS
MEDICAL PHYSICS
Worksheet 1:
Review
1. Complete the following sentences by filling in the missing words: Both mechanical pulses and wave motions transmit _____________ through a medium. The medium has to have the property of ___________________ or the wave will not progress. In a progressive mechanical wave, motion of each particle of the medium ____________________ about its equilibrium or ____________ position. There is no bulk movement of the _________________ as the wave progresses.
2. Cathy and Dominic hold between them a long, coiled, stretched spring as shown. Cathy compresses part of the spring by pulling it towards her and releasing it. They observe the compressed part of the spring moving to the right until it strikes Dominic’s hands.
(Doninson; 1997: 32)
a. Is this a pulse or wave motion? b. What would Dominic feel as the compressed part struck his hands? W1-Waves Review.doc
Page 1 of 5
3. Wing Ping and Mark hold a piece of rope tightly between them as shown. Wing Ping moves her arms up and down vigorously a number of times in an even manner. The resulting crests and troughs move to Mark.
(Doninson; 1997: 32)
a. What type of wave motion is this? b. If Wing Ping were to move her arms up and down more quickly but by the same amount, what change in the pattern of crests and troughs would occur? c. Describe how Wing Ping would have to move her hand to make the same number of crests and troughs as before, but to have the crests much higher and the troughs much lower. d. In which instance, (b) or (c), would Wing Ping use the most energy in making the wave pattern? 4. A one-dimensional wave is sent down a stretched, coiled spring which is attached to the floor and held vertically as shown. A student holding the spring moves her hand up and down rhythmically.
(Doninson; 1997: 32)
a. What type of wave is being sent down the spring? b. What name is given to the stretched parts of the spring at X and Y c. Is the distance from X to Y one wavelength?
W1-Waves Review.doc
Page 2 of 5
Fig. 1
(Breithaupt; 1999: 12)
Fig. 2
(Breithaupt; 1999: 13)
5. Use a ruler to measure a. the amplitude. b. the wavelength of the wave in Fig. 1 above. 6. In Fig. 1 above, the frequency of the wave was 5.0 Hz. Calculate a. the Period of the wave b. the speed of propagation of the wave. 7. The speed of sound in air at room temperature is 340 ms-1. Calculate a. the frequency of sound waves in air of wavelength 0.10 m b. the wavelength of sound waves in air of frequency 3000 Hz. 8. The speed of radio waves in air is 3.0 x 108 ms-1. Calculate a. the frequency of radio waves of wavelength 1500 m in air b. the wavelength of radio waves in air of frequency 1.2 MHz. 9. In Fig. 2, what is the phase difference in
a. Degrees b. radians between i. A and F ii. B and D iii. C and F iv. O and F? W1-Waves Review.doc
Page 3 of 5
W1-Waves Review.doc
Page 4 of 5
ACKNOWLEDGEMENTS Breithaupt, J. (1999) Physics. Palgrave Dobinson, G. (1997) Instant Lessons in Physics Book 1 . Strathfield, Emerald City Books
W1-Waves Review.doc
Page 5 of 5
PHYSICS
MEDICAL PHYSICS
Worksheet 1:
Review
1. Complete the following sentences by filling in the missing words: Both mechanical pulses and wave motions transmit _____________ through a medium. The medium has to have the property of ___________________ or the wave will not progress. In a progressive mechanical wave, motion of each particle of the medium ____________________ about its equilibrium or ____________ position. There is no bulk movement of the _________________ as the wave progresses.
2. Cathy and Dominic hold between them a long, coiled, stretched spring as shown. Cathy compresses part of the spring by pulling it towards her and releasing it. They observe the compressed part of the spring moving to the right until it strikes Dominic’s hands.
(Doninson; 1997: 32)
a. Is this a pulse or wave motion? b. What would Dominic feel as the compressed part struck his hands? W1-Waves Review.doc
Page 1 of 5
3. Wing Ping and Mark hold a piece of rope tightly between them as shown. Wing Ping moves her arms up and down vigorously a number of times in an even manner. The resulting crests and troughs move to Mark.
(Doninson; 1997: 32)
a. What type of wave motion is this? b. If Wing Ping were to move her arms up and down more quickly but by the same amount, what change in the pattern of crests and troughs would occur? c. Describe how Wing Ping would have to move her hand to make the same number of crests and troughs as before, but to have the crests much higher and the troughs much lower. d. In which instance, (b) or (c), would Wing Ping use the most energy in making the wave pattern? 4. A one-dimensional wave is sent down a stretched, coiled spring which is attached to the floor and held vertically as shown. A student holding the spring moves her hand up and down rhythmically.
(Doninson; 1997: 32)
a. What type of wave is being sent down the spring? b. What name is given to the stretched parts of the spring at X and Y c. Is the distance from X to Y one wavelength?
W1-Waves Review.doc
Page 2 of 5
Fig. 1
(Breithaupt; 1999: 12)
Fig. 2
(Breithaupt; 1999: 13)
5. Use a ruler to measure a. the amplitude. b. the wavelength of the wave in Fig. 1 above. 6. In Fig. 1 above, the frequency of the wave was 5.0 Hz. Calculate a. the Period of the wave b. the speed of propagation of the wave. 7. The speed of sound in air at room temperature is 340 ms-1. Calculate a. the frequency of sound waves in air of wavelength 0.10 m b. the wavelength of sound waves in air of frequency 3000 Hz. 8. The speed of radio waves in air is 3.0 x 108 ms-1. Calculate a. the frequency of radio waves of wavelength 1500 m in air b. the wavelength of radio waves in air of frequency 1.2 MHz. 9. In Fig. 2, what is the phase difference in
a. Degrees b. radians between i. A and F ii. B and D iii. C and F iv. O and F? W1-Waves Review.doc
Page 3 of 5
W1-Waves Review.doc
Page 4 of 5
ACKNOWLEDGEMENTS Breithaupt, J. (1999) Physics. Palgrave Dobinson, G. (1997) Instant Lessons in Physics Book 1 . Strathfield, Emerald City Books
W1-Waves Review.doc
Page 5 of 5
