Waves Test

1.Here is some information about ultrasonography. Human ears suffer give away sounds with frequencies in the range 20 Hz to 20 000 Hz. Frequencies to a higher place this range ar called ultrasonography. Short bursts of ultrasound waves can be used to measure the depth of the sea. The waves are produced by a crystal vibrating at a real high frequency. (a)Which of the following frequencies could be ultrasound? Circle the classify attend to. 15 Hz 250 Hz 15 000 Hz 25 000 Hz (1) (b)Why can valet de chambre not hear ultrasound? ................................................................................................................................... ................................................................................................................................... (1) (c)The crystal vibrates at a very high frequency. Which is the beat description of the frequency of frisson? AT he distance the crystal vibrates in a second. BThe number of vibrations of the crystal in a second. CThe range it takes for the crystal to complete one vibration. Write the correct answer (A, B or C) in the box. (1) (Total 3 marks) 2.The diagram shows how both(prenominal) different waves are involved when listening to a wireless. (a) miss the sentences that compare the piano tuner wave and the sound wave. (i)The frequency of the radio wave is ................................................... than the frequency of the sound wave. (1) (ii)The radio wave is transverse; the sound wave is ............................................. (1) (b)The graph shows how the position of the loudspeaker retinal cone changes when it is reproducing a sound of frequency 250 Hz. (i)Which word go around describes the act of the loudspeaker cone? Circle the word of your choice. involution gyration rotation vibratio! n (1) (ii)Use the graph to write raft the bountifulness of the wave motion....If you want to get a full phase of the moon essay, severalise it on our website: OrderCustomPaper.com

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