Calculation of Wavelengths

• bonkysleuth

  11 Aug 07, 20:36

  Howdy guys.
  
  I need some assistance in my Physics revision. Does anyone here know how to calculate wavelengths? Just the basics will do. Say the question goes somthing like :
  
  Calculate the speed of a wave with a frequency of 22Hz and a wavelength 1.5m. In this case, I'm required to find the WAVE.
  
  Then there is this one :
  
  The speed of sound in air is 330m/s. What is the wavelength of a note of frequency 440Hz?
  
  Thanks.
• wh|te_@ng3|

  11 Aug 07, 21:11

  Originally posted by bonkysleuth:

  Howdy guys.
  
  I need some assistance in my Physics revision. Does anyone here know how to calculate wavelengths? Just the basics will do. Say the question goes somthing like :
  
  Calculate the speed of a wave with a frequency of 22Hz and a wavelength 1.5m. In this case, I'm required to find the WAVE.
  
  Then there is this one :
  
  The speed of sound in air is 330m/s. What is the wavelength of a note of frequency 440Hz?
  
  Thanks.

  If you know that wavelength = speed of wave/frequency , you can find the answer.
• popikachu

  11 Aug 07, 21:15

  You may want to go homework forum or ask eagle...
• bonkysleuth

  11 Aug 07, 21:16

  Originally posted by wh|te_@ng3|:

  If you know that wavelength = speed of wave/frequency , you can find the answer.

  Much thanks.
  
  And may I know what is actually the "amplitude of the sound wave", if you happen to know.
• lpx88

  11 Aug 07, 21:17

  Just use 4mula lor..since all is given in the qn...
• tanjun

  11 Aug 07, 21:19

  Originally posted by bonkysleuth:

  Much thanks.
  
  And may I know what is actually the "amplitude of the sound wave", if you happen to know.

  From what I know, amplitude of the sound wave represents the volume of the sound. The louder the sound, the higher the amplitude.
  
  Frequency of the sound represents the pitch of the sound. It is different from the amplitude. The higher the pitch, the higher the frequency.
• eagle

  11 Aug 07, 21:21

  Originally posted by popikachu:

  You may want to go homework forum or ask eagle...

  I lazy to answer because not in Hwk Forum...
  
  But since I'm here...
  
  Amplitude of any type of wave is the maximum displacement of a particle from it's resting position.
• lpx88

  11 Aug 07, 21:21

  In layman terms its like the distance btw the 2 highest peak points.If i rmb correctly.
• eagle

  11 Aug 07, 21:22

  Originally posted by lpx88:

  In layman terms its like the distance btw the 2 highest peak points.If i rmb correctly.

  erm... wavelength u mean...
• lpx88

  11 Aug 07, 21:24

  Originally posted by eagle:

  erm... wavelength u mean...

  oo paiseh...then Its the height of the wave...
• eagle

  11 Aug 07, 21:25

  Originally posted by lpx88:

  oo paiseh...then Its the height of the wave...

  or half of the distance between the peak and the trough because that's 2 amplitudes
• lpx88

  11 Aug 07, 21:26

  Originally posted by eagle:

  or half of the distance between the peak and the trough because that's 2 amplitudes

  Or dist frm highest point to the x-axis
• Dr Who

  11 Aug 07, 21:53

  this happens only in Singaporre- Tok kok forum become Tuition Centre
  
  Some more got free lesson.......