AS Physics Edexcel - Ultrasound Watch

A.McCall
Badges: 1
Rep:
?
#1
Report Thread starter 3 years ago
#1
Hello, I am studying Physics AS and was revising. I get pretty much all the topic just one little bit I don't understand and the exam question comes up quite a bit.

How does ultrasound pass through metal?

-I have looked at the mark scheme but I would like to fully understand to be able to do questions on it in the exam
-I understand that ultrasound is a longitudinal wave and how it propagates in the air just not in metal.

Thank you very much in advance even just for reading this.

Aiden McCall
0
reply
A.McCall
Badges: 1
Rep:
?
#2
Report Thread starter 3 years ago
#2
Update:
Anyone..?
0
reply
uberteknik
  • Study Helper
Badges: 21
Rep:
?
#3
Report 3 years ago
#3
(Original post by A.McCall)
Update:
Anyone..?
The answer is the same way as they travel through air.

The difference is air molecules are fast moving and random but the sound propagates through both as a pressure wave.

In a solid, the molecules/atoms are fixed but vibrate about a mean position. Sound still propagates as a pressure wave but since the atoms are tightly bound together, the energy is transferred at a higher average speed.

Take a look at this excellent interactive page.

You can move the sliders to alter both amplitude and frequency and see the effects in different mediums including the speed of the wave.

http://www.educationscotland.gov.uk/...cm:4-248293-64
0
reply
A.McCall
Badges: 1
Rep:
?
#4
Report Thread starter 3 years ago
#4
(Original post by uberteknik)
The answer is the same way as they travel through air.

The difference is air molecules are fast moving and random but the sound propagates through both as a pressure wave.

In a solid, the molecules/atoms are fixed but vibrate about a mean position. Sound still propagates as a pressure wave but since the atoms are tightly bound together, the energy is transferred at a higher average speed.

Take a look at this excellent interactive page.

You can move the sliders to alter both amplitude and frequency and see the effects in different mediums including the speed of the wave.

http://www.educationscotland.gov.uk/...cm:4-248293-64
Thank you very much this helped alot
1
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cardiff University
    Undergraduate Open Day Undergraduate
    Wed, 27 Mar '19
  • University of Portsmouth
    Postgraduate and Part-Time Open Evenings Postgraduate
    Wed, 27 Mar '19
  • Middlesex University London
    Postgraduate Open Evening Postgraduate
    Wed, 27 Mar '19

Where do you need more help?

Which Uni should I go to? (165)
18.46%
How successful will I become if I take my planned subjects? (91)
10.18%
How happy will I be if I take this career? (148)
16.55%
How do I achieve my dream Uni placement? (131)
14.65%
What should I study to achieve my dream career? (85)
9.51%
How can I be the best version of myself? (274)
30.65%

Watched Threads

View All