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Anna007 [38]
3 years ago
4

Infinite and finite potential energy well First consider an infinite one dimensional PE well of width 1 nm. Calculate the energi

es of the first three levels. Consider a finite PE well with the same width (1 nm). The height of the barrier is 2.0 eV. There are only three energy levels E1 0.23 eV. E2- 0.89 eV, and Es 1.81 eV. Are the finite PE well levels higher or lower than the corresponding infinite well levels? Find the electron penetration depth into the barrier for each of the three energy levels. What is your conclusions?

Engineering
1 answer:
Free_Kalibri [48]3 years ago
6 0

Answer:

See attached pictures.

Explanation:

See attached pictures for detailed explanation.

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Molten metal is poured into the pouring cup of a sand mold at a steady rate of 400 cm3/s. The molten metal overflows the pouring
umka2103 [35]

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the proper diameter at its base so as to maintain the same volume flow rate is 1.6034 cm

Explanation:

Given the data in the question ;

flowrate Q = 400 cm³/s

cross section of the sprue is round

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the proper diameter at its base so as to maintain the same volume flow rate = ?

first we determine the velocity at the sprue base

V_base = √2gh = √( 2×9.81×0.2) = √3.924 = 1.980908 m = 198.0908 cm

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Q = AV = [ (( πd²_bottom)/4) × V_bottom ]

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d_bottom =  √((4×400)/(π×198.0908 ))

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Therefore, the proper diameter at its base so as to maintain the same volume flow rate is 1.6034 cm

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