Recent content by BarCode

  1. B

    How to Cut Metal to Produce Specific Musical Notes?

    Homework Statement What I want to do is have a piece of metal, then determine the length to cut it to produce the note Middle C, and so on for an octave (exclude sharps and flats). So pretty much a xylophone made from scratch. Homework Equations v = f(lambda) The Attempt at a...
  2. B

    Length of Wavelength in closed aircolumn

    Homework Statement An 80-cm long air column, closed at one end, contains sounding waves. How long is the wavelength that corresponds to: the first overtune Homework Equations v = f(lambda) The Attempt at a Solution no clue about what to do.
  3. B

    How Many Beats Will Be Heard in 10 Seconds with Frequencies of 1000Hz and 998Hz?

    Ah I see where my rearrangement went wrong, it should be Beats = frequency * time so... beats = 2Hz * 10s = 20 beats
  4. B

    How Many Beats Will Be Heard in 10 Seconds with Frequencies of 1000Hz and 998Hz?

    Ah, so I'd do 1000Hz - 998Hz = 2Hz beats = 2Hz/10s (rearranged f = b/t to b = f/t)
  5. B

    How Many Beats Will Be Heard in 10 Seconds with Frequencies of 1000Hz and 998Hz?

    [SOLVED] Calculating Beats Homework Statement A person has two audio frequency generators with which to demonstrate beats. One generator is set to 1000Hz and the other to 998Hz. How many beats will be heard in 10s? Homework Equations f = number of beats/time The Attempt at a...
  6. B

    Calculating Wave Frequency in 1 min: 8.0m & 2.0m/s

    60/4 = 15 waves in 60 seconds.
  7. B

    Calculating Wave Frequency in 1 min: 8.0m & 2.0m/s

    F = 1/T T = P = 8.0m / 2.0s = 4s F = 1/4
  8. B

    Calculating Wave Frequency in 1 min: 8.0m & 2.0m/s

    I get confused as to how to know which number to use for the denominator.
  9. B

    Calculating Wave Frequency in 1 min: 8.0m & 2.0m/s

    F = 1/T, which is all I know.
  10. B

    Calculating Wave Frequency in 1 min: 8.0m & 2.0m/s

    Homework Statement The wavelength of a water wave is 8.0m and its speed is 2.0m/s. How many waves will pass a pixed point in the water in 1.0min? Homework Equations V =f(lambda) The Attempt at a Solution As far as I got was that 1.0 min = 60 seconds. From there, I am totally lost.
  11. B

    How Is Work Calculated When Friction Is Involved?

    Homework Statement Calculate the work done by a 0.47N force pushing a 0.026kg pencil 0.26m against a force of friction of 0.23N. Knowns: F = 0.47N m = 0.036kg d = 0.26m Ff = 0.23N Homework Equations Work = Force x Distance The Attempt at a Solution Since I know work =...
  12. B

    How Does the Force to Start and Maintain Car Movement on Asphalt Differ?

    Homework Statement A car of weight 1500 N has its brakes locked. Calculate the force needed to begin to drag he car on dry asphalt. How will the force needd to slide it along the asphalt compare with the force needed to start sliding it? Why? (Static coefficient=1.2, Kinetic coefficient=0.8)...
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