A bat emits a sound wave with a frequency of 25.0 kHz and a wavelength of 0.0136 metres. Calculate the speed of this sound wave.

In this question you are given frequency and wavelength of the wave and you are asked for the speed. You need to use the formula on you sheet that uses these three properties : v = f x λ, where v is the speed, f is the frequency and λ is the wavelength.

You know from the question that f = 25kHz and λ = 0.0136m, however 1 kHz is actually 1000 Hz and you need to remember this before you do your calculation. Therefore the numbers you need to put into your calculator are f = 25 x 1000 = 25000 and λ = 0.0136.

The calculation that you then need to do is 25000 x 0.0136 = 340. You must not forget the units of speed, which here are metres per second, or m/s. Your final answer is 340 m/s.

LD
Answered by Libby D. Physics tutor

17410 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

A baseball player strikes a ball with an initial velocity of 43ms^-1 at an angle of 32° to the horizontal. How far does the ball travel horizontally in 4 seconds?


Why does your hair stand on end when you touch a Van de Graaff generator?


A boy kicks a ball and it is accelerated uniformly from rest so that after 10 seconds it has achieved a speed of 15m/s. Find the ball's acceleration.


Describe the purpose of the moderator in a nuclear fission reactor.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences