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

1.	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 is 1.7 km s-1? The operating frequency of the scanner is 4.2 MHz.
Answer» v = 1.7 km s^-1 = 1.7 x 1000 ms^-1 = 1700 ms^-1 Frequency, v = 4.2 MHz = 4.2 x 10⁶ Hz ∴ λ = ν/v = {1700}/{4.2 x 10⁶} = 4.05 x 10⁴ m

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 is 1.7 km s-1? The operating frequency of the scanner is 4.2 MHz.

Answer»

v = 1.7 km s^-1

= 1.7 x 1000 ms^-1

= 1700 ms^-1

Frequency, v = 4.2 MHz

= 4.2 x 10⁶ Hz

∴ λ = ν/v = {1700}/{4.2 x 10⁶}

= 4.05 x 10⁴ m

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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 is 1.7 km s-1? The operating frequency of the scanner is 4.2 MHz.

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