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Sergio039 [100]
3 years ago
14

Which of the following would make a good semiconductor? aluminum germanium gold concrete

Physics
2 answers:
Nutka1998 [239]3 years ago
8 0

Answer:

Germanium

Explanation:

The properties a semiconductor lie between those of conductor and insulator.  Germanium has four valence electrons. It is a semiconductor. On the other hand, aluminium and gold are metals. Germanium has good electrical and mechanical properties. At certain temperature, germanium provides many free electrons.

yaroslaw [1]3 years ago
5 0
Germanium would make a good semiconductor
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A surgical microscope weighing 200 lb is hung from a ceiling by four springs with stiffness 25 lb/ft. The ceiling has a vibratio
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Answer:

If there is no damping, the amount of transmitted vibration that the microscope experienced is   = 5.676*10^{-3} \ mm

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The motion of the ceiling is y = Y sinωt

y = 0.05 sin (2 π × 2) t

y = 0.05 sin 4 π t

K = 25 lb/ft  × 4  sorings

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Amplitude of the microscope  \frac{X}{Y}= [\frac{1+2 \epsilon (\omega/ W_n)^2}{(1-(\frac{\omega}{W_n})^2)^2+(2 \epsilon  \frac{\omega}{W_n})^2}]

where;

\epsilon = 0

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= \sqrt { \frac{100*32.2}{200}}

= 4.0124

replacing them into the above equation and making X the subject of the formula:

X = Y * \frac{1}{\sqrt{(1-(\frac{\omega}{W_n})^2)^2})}}

X = 0.05 * \frac{1}{\sqrt{(1-(\frac{4 \pi}{4.0124})^2)^2})}}

X = 5.676*10^{-3} \ mm

Therefore; If there is no damping, the amount of transmitted vibration that the microscope experienced is   = 5.676*10^{-3} \ mm

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<h3><em>hope </em><em>it </em><em>helps </em><em>you </em></h3>
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