Answer:
The one end of a hollow square bar whose side is (10+N/100) in wit
Explanation:
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.
Answer:
So the fraction of proeutectoid cementite is 44.3%
Explanation:
Given that
cast iron with 0.35 % wtC and we have to find out fraction of proeutectoid cementite phase when cooled from 1500 C to room temperature.
We know that
Fraction of proeutectoid cementite phase gievn as
Now by putting the values
So the fraction of proeutectoid cementite is 44.3%
Answer:
a) Selection and control of material
b) Control of stress
c) Control of the environment
Explanation:
The measures that can be taken to control and prevent the formation of strss corrosion cracks are:
a) Selection and control of material
It deals with the selection of the best quality material that can resist the stress corrosion cracks to a high extent.
b) Control of stress
It is to control or reduce the intensity of the major stress that causes the stress corrosion cracks.
c) Control of the environment
It includes the prevention of the material from the corrosive environment by removing the component from the region or controlling the environment condition around the object.
Atoms are the smallest unit of matter.
There your answer!
