Measuring Speed of Sound Using Echoes | GCSE Physics

Measure the speed of sound by clapping two wooden blocks together in front of a wall. Repeatedly clap ten times by syncing the each clap to the previous clap's echo. Time how long it takes to make ten claps. Use the speed equation to get the speed of sound.

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[ishaalimtiaz]

Ready made notes for those who need it!

Two people stand a distance of around 100m apart.
The distance between them is measured using a trundle wheel.
One of the people has two wooden blocks, which he bangs together above his head.
The second person has a stopwatch which he starts when he sees the first person banging the blocks together and stops when he hears the sound.
This is then repeated several times and an average value is taken for the time.
The speed of sound can then be calculated using the equation that links speed, distance, and time.


A person stands about 50m away from a wall (or cliff). This distance is measured using a trundle wheel.
The person claps two wooden blocks together and listens for the echo.
The person then starts to clap the blocks together repeatedly, in rhythm with the echoes.
A second person has a stopwatch and starts timing when he hears one of the claps and stops timing 20 claps later.
The process is then repeated and an average time calculated.
The distance travelled by the sound between each clap and echo will be (2 x 50) m.
The total distance travelled by sound during the 20 claps will be (20 x 2 x 50) m.
The speed of sound can be calculated from this distance and the time using the equation that links speed, distance, and time.

[abelk]

noice mate you did really well i cant see my book because im partially blind so i listened to your voice and all my answers were cleared, you must be dumbledore

[mrfantastic]

Amazing vid...ur underrated man but gr8 though
Keep up the good work

[mohammedshaik]

My teacher made me watch this cuz we might have exam questions based on it.

[eluzive_]

Well... I... guess I'm really late... But thank you, helped me a lot!

[arnoldtvisagie]

Very clever way of measuring the speed of sound.

[globubb]

My english not so good i from Africa and im learning physics for school. This video very good thank you

[Titugotvaluegamer]

THANKS BY THIS I SCORED MARK IN MY TODAY EXAM ❤❤❤❤❤❤❤❤❤❤❤❤❤❤

[johnbenedictflorendo]

teach them to go to space echo equal measure per second to gravity in space

[sun-pg]

Did anyone put a more accurate set of statistics with that?

[sun-pg]

Lets see how long it takes for this message to be removed.

[sun-pg]

91.44 inches (36 times 2.54) 100 centimetres divided by 2.54 equals 39.37007874 inches.

[MoneroProvideMP]

Can you explain this in an experiment asking you to measure the the speed of sound *IN AIR*?

[mike-bs]

This video helped me a lot when I could not read from my text book

Thank you so much VT

[sun-pg]

The speed of sound in imperial measurement is one thousand 0866 feet per second The cosine for thirty degrees is .point eight six six. When a sound wave travels seventy five feet is resounds. We call this resound an echo. When that happens it makes an harmonic in the space the sound came from. An harmonic is hexagonal. It has six sides. They measure six times one and six sides the square root of three. The haxagon has one cosine that is point five and one that is the square root of point seven five. The arcs cross at about one tenth of the radius of the circle that is made by the wave.. These points are known as nodes. In a solid body a node will move to its nearest whole number in physics this is called an harmonic. If we divide the square root of point seven five by ten we have point 0 eight six six. That is: one tenth of cosine thirty degrees. Tangent one tenth gives an angle. when we deduct that angle from ninety degrees we have an angle that has a tangent of ten. If we divide one by the cosine we have from tangent point one we have the cosecant. In this case, it is one point 0 one. ten times one point 0 one is ten point 0 one. In the case of this equation we used the cosine of thirty degrees to divide cosine thirty degrees divided by ten. So: ten times the square root of point 75 that is cosine thirty degrees is the square root of 75.The square root of 75 times the square root of one point 0 one equals the square root of seventy five point seven five. We can see if we draw this the co ordinade of a hexagon are the same as the speed of sound in feet per second is the same as the co ordinates of a hexagon. The social significance of this is we are looking at one of the co ordinates of 'Noah's Ark' That is Knowers arc.

[lolosity]

This a horrifically inaccurate experiment.

[nraps_]

will the experiment still work if we don't use wooden blocks? if yes what other things we could use to make this experiment work?