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tino4ka555 [31]
3 years ago
15

Two technicians are discussing disc brake rotor service. Technician A says that the inner races (bearing cups) should be removed

from the rotor before it is mounted on the lathe. Technician B says that a non-directional finish on the rotor surfaces can be obtained by using sandpaper. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians
D) Neither technician
Physics
1 answer:
KatRina [158]3 years ago
5 0

Answer:

B) Technician B only

Explanation:

When working on the lathe, the bearing cups serve as a centering device while the rotor is on a bench lathe.

The outer and inner bearing seal are grease before mounting the rotor on the lathe for one-piece rotors.

The rotor surface is required to be made non-directional after machining so as to enable the proper seat of the new pads to the rotor . The rotor surface should be dressed with 120-grit to 150-grit aluminium oxide sand paper mounted on a sanding disc power tool.

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The wavelength of red helium-neon laser light in air is 632.8 nm.
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(a) 4.74\cdot 10^14 Hz

The frequency of an electromagnetic wave is given by:

f=\frac{c}{\lambda}

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In this problem, we have laser light with wavelength

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(b) 427.6 nm

The wavelength of an electromagnetic wave in a medium is given by:

\lambda=\frac{\lambda_0}{n}

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In this problem, we have

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\lambda=\frac{632.8 nm}{1.48}=427.6 nm

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The speed of an electromagnetic wave in a medium is

v=\frac{c}{n}

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