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Anni [7]
3 years ago
12

Harvey has an inclination towards astronomy and wants to construct telescope mirrors. Which metal should he use for reflective c

oatings in telescope mirror? A.
tungsten

B.

stainless steel

C.

aluminum

D.

copper

E.

iron
Engineering
1 answer:
lys-0071 [83]3 years ago
3 0

Answer:

The metal Harvey should use for reflective coatings in telescope mirror is;

C. Aluminum

Explanation:

In a telescope, the mirror of the telescope is usually made of a temperature-resistant and strong glass, while the reflective coating of the mirrors is made usually from aluminum. A protective coating often composed of silicon dioxide is placed n the top of the reflective coating

Aluminum is used in a telescope, rather than the silver, which is the most reflective material, because silver requires special conditions to be able to work, and silver tarnishes when exposed to air containing sulfur, and silver is susceptible to corrode.

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Why does the auto industry prefer uniform (national) standards for automobile emissions as opposed to regionally varying standar
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Explanation:

For automobile emission, a uniform standard is preferred, because no unnecessary advantage is given by it to any company that is located in particular states where the regional standards are less severe.

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3 0
3 years ago
You work in a furniture store. You receive a
spin [16.1K]

Answer:

18 pieces of furniture

Explanation:

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A cylindrical metal specimen of initial diameter d0 =14 mm, initial length L0=53 mm, strain hardening exponent n=0.31, strength
Marrrta [24]

Answer:

a) Ef = 0.755

b) length of specimen( Lf )= 72.26mm

  diameter at fracture = 9.598 mm

c) max load ( Fmax ) = 52223.24 N

d) Ft = 51874.67 N

Explanation:

a) Determine the true strain at maximum load and true strain at fracture

True strain at maximum load

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True strain at fracture

Ef = 0.755

b) determine the length of specimen at maximum load and diameter at fracture

Length of specimen at max load

Lf = 72.26 mm

Diameter at fracture

= 9.598 mm

c) Determine max load force

Fmax = 52223.24 N

d) Determine Load ( F ) on the specimen when a true strain et = 0.25 is applied during tension test

F = 51874.67 N

attached below is a detailed solution of the question above

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2 years ago
What are the conditions for sheet generator to build up its voltage?
MA_775_DIABLO [31]

Answer:

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