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Shalnov [3]
3 years ago
15

To prevent hydroplaning, _____. A. slow down B. speed up C. deflate your tires D. use cruise control

Engineering
1 answer:
Oksana_A [137]3 years ago
7 0

<u>Answer:</u>

<em><u>a. slow down</u></em>

<u>Explanation:</u>

To properly answer this question, you must understand what hydroplaning is. Hydroplaning is essentially when a car begins to slide on a wet road and the driver cannot control the vehicle. This happens because of an overflow in water on the road which causes the tires to begin to skim on the surface of the water. Having a proper amount of tire tread, typically 5/23 inches deep or above, will reduce chances of a car hydroplaning on a wet surface.

<em>* note:</em>

<em>if you would like a better understanding of what hydroplaning looks like, there are videos on the internet you could watch that show real life footage of what it looks like when cars hydroplane. I recommend searching up 'car hydroplaning.'</em>

<em />

Now that we fully understand the question, let's examine each option individually and determine what is the best thing to do to prevent hydroplaning.

<em><u>option a</u></em>

<em><u>slow down</u></em>

<em><u /></em>

When a persons car begins to hydroplane, it may be going so fast that it becomes difficult to control. Therefore, slowing down to reduce the speed of the car would be your best bet to try and regain control.

<u><em>option b</em></u>

<u><em>speed up</em></u>

<u><em /></u>

Stepping on the accelerator will increase the speed of the car which will cause it continue to skim on the surface of the water. This may cause the driver to lose even more control of the vehicle.

<u><em>option c</em></u>

<u><em>deflate your tires</em></u>

<u><em /></u>

Deflating your tires would not be a very reliable option, as it can make you lose control even more. It is also not a guarantee that you would even be able to deflate your tires.

<u><em>option d</em></u>

<u><em>use cruise control</em></u>

<u><em /></u>

If you put your car on cruise control it can punctually cause you to lose more control and cause your car to increase more speed.

Now that we have gone through each option individually, we can determine that option a 'slow down' is the best thing to do to prevent hydroplaning.

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Answer:

The original length of the specimen l_{o} = 104.7 mm

Explanation:

Original diameter d_{o} = 30 mm

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Change in diameter Δd = 0.04 mm

Final length l_{1} = 105.20 mm

Elastic modulus E = 65.5 G pa = 65.5 × 10^{3} M pa

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We know that the relation between the shear modulus & elastic modulus is given by

G = \frac{E}{2(1 + \mu)}

25.5 = \frac{65.5}{2 (1 + \mu)}

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This is the value of possion's ratio.

We know that the possion's ratio is given by

\mu = \frac{\frac{0.04}{30} }{\frac{change \ in \ length}{l_{o} } }

{\frac{change \ in \ length}{l_{o} } = \frac{\frac{0.04}{30} }{0.28}

{\frac{change \ in \ length}{l_{o} } = 0.00476

\frac{l_{1} - l_{o}  }{l_{o}  } = 0.00476

\frac{l_{1} }{l_{o} } = 1.00476

Final length l_{o} = 105.2 m

Original length

l_{o} = \frac{105.2}{1.00476}

l_{o} = 104.7 mm

This is the original length of the specimen.

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