Question number 14 to 20.

Question number 14 to 20. 14. A body is vibrating in one minute. If the velocity of sound tn air 360m/ s, I'ind: a) Frequency of the vibration in I Iz Class IX Holiday Homework 2018-19 b) \Vavclcngth of sound 'duccd with the help of a thc •rk:ng of SC 16. A hospital uses an ultrav scanner t' ' l' tumors tn a tissue. What the wavelength of ultrasound tissue tn htch the spccd of ultrasound is 1.5km/scc 'l he operating frequcncv the scanner MI 17.Statc anv two charactcnsttcs 18.A ship sends out ultrasound that returns the sea-bed and is detected after 3.22scc. If the speed ot- ultrasound tn 1530m/ s, calculate the distance 01 the sea-bed from the ship? 19.1 low do the frequency and amplitudes affect mustcal sound? 20.1 :.xplain how the human car works?

Dear Student,

Please find the solution to one of your queries below:

20 . Different sounds produced in our surroundings are collected by pinna that sends these sounds to the ear drum via the ear canal. The ear drum starts vibrating back and forth rapidly when the sound waves fall on it. The vibrating eardrum sets the small bone hammer into vibration. The vibrations are passed from the hammer to the second bone anvil, and finally to the third bone stirrup. The vibrating stirrup strikes on the membrane of the oval window and passes its vibration to the liquid in the cochlea. This produces electrical impulses in nerve cells. The auditory nerve carries these electrical impulses to the brain. These electrical impulses are interpreted byt he brain as sound and we get a sensation of hearing.





Hope this information will clear your doubts about the topic.


For more queries just ask in a separate thread here on the forum and our experts will try to help you out as soon as possible.


Regards