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A 30cm string of linear density 7.0 g/m is stretched to a tension of 35N and fixed at both ends
(a) What is the wave speed for the string.
(b) Calculate the wavelengths and frequencies of the first four harmonics.
(c) Which of these frequencies are audible to human hearing.
(d) The tension is increased to 30N.
(e) Now what are the wavelengths and frequencies of the four harmonics.
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A beam of pions (Pi-mesons, with rest energy m(Pi)c^2=140 MeV) consisting of 10^10pions/cm^2s moves with speed such that the total energy of each pion is 10^5 MeV. What is the pressure the beam exerts on a surface that absorbs it and brings it to res..
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