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A hospital uses an ultrasonic scanner to...

A hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound in the tissue in which the speed of sound in `1.7kms^(-1)` ? The operating frequency of the scanner is 4.2MHz.

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`4.1 xx 10^(-4)m`
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NCERT GUJARATI-WAVES-Exercises
  1. You have learnt that a travelling wave in one dimension is represented...

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  2. A bat emits ultrasonic sound of frequency 1000kHz in air. If the sound...

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  3. A hospital uses an ultrasonic scanner to locate tumours in a tissue. W...

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  4. A transverse harmonic wave on a string is described by y(x,t) = 3.0 si...

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  5. For the wave discribed in Exercise 15.8, plot the displacement (y) ver...

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  6. For the travelling harmonic wave y(x,t) = 2.0 cos 2 pi (10 t - 0.008...

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  7. The transverse displacement of a string (clamped at its both ends) is ...

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  8. (i) For the wave on a string described in Exercise 15.11. do all the p...

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  9. Given below are some functions of x and t to represent the displacemen...

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  10. A wave stretched between two rigid supports vibrate in its fundamental...

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  11. A metre - long tube open at one end, with a movalble piston at the oth...

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  12. A steel rod 100 cm lomg is clamped at its middle. The fundamental freq...

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  13. A pipe 20 cm long is closed at one end. Which harmonic mode of the pip...

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  14. Two sitar strings A and B playing the note 'Ga' are slightly out of tu...

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  15. Explain why (or how): (a) in a sound wave a displacement node is a p...

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  16. A train standing at the outer signal of a railway station blows a whis...

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  17. A train standing in a station-yard, blows a whistle of frequency 400Hz...

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  18. A travelling harmonic wave on a string is described by y(x,t) = 7.5 si...

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  19. A narrow sound pulse (for example, a short pip by a whistle) is sent a...

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  20. One end of a long string of linear mass density 8.0 xx 10^(-3) kg m^(-...

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