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adoni [48]
3 years ago
13

Which of the following is an acceptable first step procedure to help prevent scratching when cleaning a transparent plastic surf

ace?O Gently wipe the surface with a clean, dry, soft cloth O Flush the surface with clean water O Gently wipe the surface with a clean, soft cloth moistened with de-mineralized or distilled water .
Engineering
1 answer:
Alchen [17]3 years ago
4 0

Answer:

Flush the surface with clean water

Explanation:

An example can be demonstrated when cleaning an aircraft's transparent plastic windshield. The first step is to flush it with clean water to help remove all grit and sand that might be on the surface. Once the surface is free of any sand and grit capable of scratching the plastic surface, it can then be washed and then rinsed.

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For the same cross-sectional area, which column provides the higher buckling load: a circular bar or a circular tube?
juin [17]

Answer:

Circular tube

Explanation:

Now for better understanding lets take an example

Lets take

Diameter of solid bar= 4\sqrt{2} cm

Outer diameter of tube =6 cm

Inner diameter of tube=2 cm

So from we can say that both tubes have equal cross sectional area.

We know that buckling load is given as P = \dfrac{\pi ^2EI}{L_e^2}      

If area moment of inertia(I) is high then buckling load will be high.

We know that  area moment of inertia(I)

For circular tube I = \dfrac{\pi }{64}(D_o^4-D_i^4)

For circular bar I = \dfrac{\pi }{64}D^4  

Now by putting the values

    For circular tube I=62.83 cm^4

  For circular bar I=50.26 cm^4

So we can say that for same cross sectional area the  area moment of inertia(I) is high for tube as compare to bar.So buckling load  will be higher in tube as compare to bar.

3 0
3 years ago
Answer back to question for la ,lot points
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Explanation:

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Given : f(x) = x³- 7x²+ 36 Draw the graph of f neatly on F graph paper. Clearly indicate an Intercepts and coordinates of turnin
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Answer:

Explanation:

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7 0
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