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2 years ago

Which one of the following statements is true? Explain.

Physics

1 answer:

Makovka662 [10]2 years ago

5 0

Answer:

All the given option is false.

Explanation:

This is not true for all the materials like composite because the Poisson ratio for composite material can be negative that is why positive tensile stress may produce positive lateral strain.

This is not true for all the material because the Poisson ratio for some material can be positive that is why positive tensile stress may produce negative lateral strain.

The explanation is same as option A.

This is not true for all the materials ,It is valid only up to elastic limit .After the elastic limit the strain and stress does not follow linear path.

This is not true for all the materials because some materials like composite is having negative value of Young's modulus.

Therefore all the given option is false.

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Friction _____.

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Answer:

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Explanation:

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1 year ago

The bending of waves such as sound waves, light waves, and waves in water, around obstacles or the edges of openings is called.

kolezko [41]

Answer:

Diffraction

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2 months ago

The interaction between electrical energy and magnetism has been an important

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Answer:

Maybe

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2 years ago

A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 38 ft/s2. what is the dist

e-lub [12.9K]

Convert 38 ft/s^2 to mi/h^2. Then we se the conversion factor > 1 mile = 5280 feet and 1 hour = 3600 seconds.

So now we show it > $38 \frac{ft}{s^2} x \frac{1mi}{5280ft} x \frac{(3600s)^2}{(1h)^2} = 93272.27 \frac{mi}{h^2}$

Then we have to use the formula of constant acceleration to determine the distance traveled by the car before it ended up stopping.

Which the formula for constant acceleration would be > $v_2^2=v_1^2 + 2as$

The initial velocity is 50mi/h $(v_1=50)$

When it stops the final velocity is $(v_2=0)$

Since the given is deceleration it means the number we had gotten earlier would be a negative so a = -93272.27

Then we substitute the values in....

$0^2 = 50^2 + 2(-93272.27)s

0 = 2500 - 186544.54s

Isolate S next.

185644.54s= 2500

s = 2500/(185644.54)

s=0.0134
$

So we can say the car stopped at 0.0134 miles before it came to a stop but to express the distance traveled in feet we need to use the conversion factor of 1 mile = 5280 feet in otherwards > $0.0134 mi * \frac{5280ft}{1mi} = 70.8 ft$
So this means that the car traveled in feet 70.8 ft before it came to a stop.

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2 years ago

11. Which of the following is a proper unit of

Sergeeva-Olga [200]

D is the correct answer!!

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2 years ago

Read 2 more answers