Explanation:
thermal expansion ∝L = (δL/δT)÷L ----(1)
δL = L∝L + δT ----(2)
we have δL = 12.5x10⁻⁶
length l = 200mm
δT = 115°c - 15°c = 100°c
putting these values into equation 1, we have
δL = 200*12.5X10⁻⁶x100
= 0.25 MM
L₂ = L + δ L
= 200 + 0.25
L₂ = 200.25mm
12.5X10⁻⁶ *115-15 * 20
= 0.025
20 +0.025
D₂ = 20.025
as this rod undergoes free expansion at 115°c, the stress on this rod would be = 0
Answer:
a
Hardness Test
b
The available hardness test are
- Rockwell hardness test
- Vicker's hardness test
- knoop test
- scratch test
- Brinell hardness test e.t.c
I would suggest Rockwell test because
- It has good accuracy
- In this test loads can be applied in 2 stages hence better results are obtained
- it saves time because it testing are faster
c
Well the following would be the reasons for low hardness value
- It could be because the steel used has a low percentage of carbon
- it could also result from the quenching medium used (e.g water , brine solution e.t.c)
d
In order to solve this problem here are the following ways
- When selecting steel the ones with a carbon percentage 0.3% to 0.8% should be selected
- When quenching the quenching medium should be brine solution
Explanation:
The reason why the answer to question is hardness test is because the heat treatment was carried out to obtain hardness so if it is great then the heat treatment is good
The largest, low-cost airline carrier in the world that recently canceled thousands of flights for reasons partially disputed by the federal aviation administration (FAA) is Southwest Airlines.
Southwest Airlines canceled 2,500 flights in just a few days.
According to Southwest Airlines, the cause of the cancellation is due to air traffic control problems and disruptive weather.
While FAA claimed that nothing like a reported case of air traffic and staffing shortages.
Southwest Airlines is the world's largest low-cost carrier and has its main office is located in Dallas, Texas.
Hence, in this case, it is concluded that the correct answer is "Southwest Airlines."
Learn more here: brainly.com/question/24782945
Answer:
A resistor
Explanation:
A diode is an electrical device that allows current to pass through it only in one direction. When a diode is forward biased, it allows current to flow through it in direction but when it is reverse biased, it stops current from flowing through it.
The maximum forward current is the maximum current allowed to flow through the diode when conducting in the forward bias condition. If the maximum forward current is exceeded, it leads to heat which causes damage to the diode.
A resistor is conducted in series to the forward biased diode to limit the current flowing through it thereby ensuring that the current is below the maximum forward current.
Answer:
A guild are an association of skilled merchants, craftsmen and artisans that provide support and protection for their members and push their professional interest forward and further their craft
Because the guild guild members mainly gained their skill through knowledge passed to them by their family bloodlines, other unskilled workers were by not being schooled on the craft and by family tradition not allowed to join a guild based on the nature knowledge transfer the guild members have which is mainly several generations of family trade trainings
Explanation:
