Calculate the wavelength of the first line in the Lyman series and show this line in the ultraviolet part of the spectrum?

Engineering

1 answer:

Anit [1.1K]3 years ago

7 0

Answer:

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Explanation:

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1. A thin plate of a ceramic material with E = 225 GPa is loaded in tension, developing a stress of 450 MPa. Is the specimen lik

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fracture will occur as the value is less than E/10 (= 22.5)

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If the maximum strength at tip Is greater than theoretical fracture strength value then fracture will occur and if the maximum strength is lower than theoretical fracture strength then no fracture will occur.

$\sigma_m = 2\sigma_o [\frac{a}{\rho_t}]^{1/2}$

$= 2\times 750 (\frac{\frac{0.2mm}{2}}{0.001 mm}})^{1/2}$

= 15 GPa

fracture will occur as the value is less than E/10 = 22.5

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