Explanation:
Polymer degradation is a change in the properties of the polymer – such as tensile strength, color, shape, molecular weight – or of a polymer-based product under the influence of one or more environmental factors, such as heat, light, chemicals, or any other applied force.
- <em>Photoinduced degradation:</em> Electromagnetic waves with the energy of visible light or higher, such as ultraviolet light, X-rays and gamma rays are usually involved in such reactions.
- <em>Thermal degradation:</em> Chain-growth polymers can be degraded by thermolysis at high temperatures to give monomers, oils, gases and water. This kind of degradation can happen by pyrolysis, hydrogenation or gasification:
- <em>Chemical degradation:</em> it can happen through many mechanism such as oxidation, ozone cracking, galvanic actior or Chlorine-induced cracking
- <em>Biological degradation:</em> by microorganisms to give lower molecular weight molecules
In the case of ceramics, environmental factors are the major cause. There are several ways in which ceramics break down physically and chemically
- <em>Physical degrdation:</em> from mishandling, impacts and abrasion, frost and mold growth
- <em>Chemical degradation:</em> because of water and soluble salts
I hope you find this information useful and interesting! Good luck!
He probably just like the cool weather or being outside lol
Explanation:
There are two rake angle types :
Positive rake
This is the case that occurs when looking from the inner side the face of the cutting tool slopes away from the cutting edge.
Negative rake
This is the case that occurs when the face of the cutting tool slopes away from the cutting edge at the outer side.
Increasing the positive rake angle means that the cutting tool will get sharper thus making the tool weaker. So, brittle material will form discontinuous chips and ductile material will form continuous chip. The tool life may also be reduced.
Increasing the negative rake angle means that the cutting tool will get blunt thus making the tool stronger. So, brittle material will form continuous chips. Results in higher temperature of the tool. Surface finish might increase.
Answer:) The correct answer is B. at the end of the fuel rail.
2) The one who is correct is the Technician A.
Explanation: