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leonid [27]
3 years ago
7

What is the full meaning of D.D.T​

Physics
1 answer:
kogti [31]3 years ago
4 0
Dichloro-Diphenyl Trichloroethane- it was developed as the first of the modern synthetic insecticides in the 1940s.
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A very long string (linear density 0.7 kg/m ) is stretched with a tension of 70 N . One end of the string oscillates up and down
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To develop this problem it is necessary to apply the concepts related to Wavelength, The relationship between speed, voltage and linear density as well as frequency. By definition the speed as a function of the tension and the linear density is given by

V = \sqrt{\frac{T}{\rho}}

Where,

T = Tension

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Our data are given by

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Linear density , \rho = 0.7 kg/m

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V = \sqrt{\frac{T}{\rho}}

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Speed can also be expressed as

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Re-arrange to find \lambda

\lambda = \frac{V}{f}

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f = \frac{1}{0.35}

f = 2.86 Hz

Therefore replacing to find \lambda

\lambda = \frac{10}{2.86}

\lambda = 3.49m

Therefore the wavelength of the waves created in the string is 3.49m

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