Answer very briefly II — task. Science State Board, Class 10.

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1. What will be the frequency sound having $0.20$ $m$ as its wavelength, when it travels with a speed of $331$ $m/s$?

The formula to find the frequency is

The frequency is .

2. Name two animals, which can hear ultrasonic vibrations.

Pick an animal which can hear ultrasonic vibration in the following

Did you find an error?

8. Answer very briefly II