Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

- Characteristics of Sound - Physics by Gunjan555 484 views
- Physics - Sound [SMPN49] by Annisa Hayatunnufus 186 views
- Sound by REVATHIAMBIKA VEN... 1312 views
- H177 Midterm Nur R by Victoria Vesna 353 views
- Physics Question on Sound by Anu Agarwal 132 views
- Science Double Award syllabus by Daniel McClelland 8723 views

No Downloads

Total views

4,449

On SlideShare

0

From Embeds

0

Number of Embeds

8

Shares

0

Downloads

76

Comments

0

Likes

5

No embeds

No notes for slide

- 1. Sound <ul><li>GCSE Physics </li></ul>
- 2. Aims of the lesson <ul><ul><ul><ul><ul><li>To recall how a sound wave is created and travels through a medium </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><li>To state how different sounds can be produced and relate this to the frequency and amplitude of the wave </li></ul></ul></ul></ul>
- 4. Doppler Effect
- 5. Going Super Sonic
- 7. Cathode Ray Oscilloscope
- 8. Wave Animation
- 9. Complete the CRO traces Original Frequency x2 of Original Frequency x2 and ½ amplitude of Original Exactly the same sound (only a couple of seconds later)
- 10. <ul><li>To recall that sound can bounce off surfaces </li></ul><ul><li>To describe how sound waves can be used to detect objects both in industry and medicine </li></ul>Aims of the lesson
- 13. Echoes <ul><li>An echo is a reflected sound. When sound is reflected off a plane (or flat) surface- </li></ul><ul><li>Angle of incidence = Angle of reflection </li></ul>Some of the energy of the incident wave will be absorbed when it is reflected by a surface.
- 14. Example <ul><li>A fishing boat sends out a pulse of ultra sound. The reflected pulses are detected after 0.8 s and 1.4 s. The speed of ultrasound in water is 1500 m/s. </li></ul><ul><li>Calculate 1.) the depth of the sea bed and 2.) the depth of the shoal of fish. </li></ul>1. Distance x 2 = Speed x Time = 1500 x 1.40 = 2100m 2. Distance x 2 = Speed x Time = 1500 x 0.8 = 1200m The sound travels double the distance so… Distance to sea bed = 2100 / 2 = 1050m Distance to shoal of fish = 1200 / 2 = 600m
- 15. http://www.radiologyinfo.org/en/info.cfm?pg=genus&bhcp=1
- 16. How is ultrasound used? <ul><li>Ultrasound (> 20000 Hz) like all sound is reflected different amounts by different materials. </li></ul><ul><li>A receiver can be used to detect the amount of ultrasound reflected or lost from a signal. </li></ul><ul><li>A computer can then be used to build up an image of these ultrasound signals. </li></ul><ul><li>This is how ultrasound is used in prenatal scanning and industrial quality control. </li></ul>
- 17. <ul><li>How do these animals use sound to aid them? </li></ul>Page 89 and 90
- 18. Measuring Speed of sound
- 19. The results are in… <ul><li>Using this set of results, calculate the speed of sound in air- </li></ul><ul><li>The exact speed of sound is 330m/s, what errors in the experiment could account for a lesser value? </li></ul>Time (s) 0.425 0.462 0.470 0.432 0.447 Attempt 1 2 3 4 5 Distance = 134m

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment