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nalin [4]
3 years ago
6

Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. T

he length l of the bar obeys the following relation: l=1.0000+2.4×10−5T, where T is the number of degrees Celsius above room temperature. What is the change of the bar's length if the temperature is raised to 13.0 ∘C above room temperature?
Physics
1 answer:
raketka [301]3 years ago
4 0

Answer:

ΔL =0. 000312  m

Explanation:

Given that

At  room temperature ( T = 25 ∘C)  ,L= 1 m

L=1+2.4\times 10^{-5}T

So the length at  13.0 ∘C above room temperature

L=1+2.4\times 10^{-5}T

L=1+2.4\times 10^{-5}\times 13

L=1.000312 m

So the change in length

ΔL = 1.000312 - 1.0000 m

ΔL =0. 000312  m

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6. A car drives 750 miles in 10 hours. Calculate the speed of the truck<br><br><br> .
Dmitriy789 [7]

Answer:

75 miles an hour

I hope this is correct and helps

3 0
3 years ago
What would happen if the amount of light reaching the Earth from the sun were cut in half? Predict what the climate and life wou
kicyunya [14]
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hope that helps a bit! :)
5 0
3 years ago
A spin balancer rotates the wheel of a car at 480 revolutions per minute. if the diameter of the wheel is 26 inches, what road s
Mariana [72]
Part A:
To answer this item, we need to convert the given revolutions per minute in speed expressed as miles per hour. In order to do so, we need to use the dimensional analysis and the appropriate conversion factor.
 
We calculate the circumference that is covered by the wheel.
     C = πD
where C is the circumference and D is the diameter.

Substitute the known values,
       C = π(26 in) = 81.68 inches

The speed tested is calculated below.
      s = (81.68 inches/rev)(480 rev/min)(1 mil/63360 inches)(60 min/1 hr)
            s = 37.127 mil/h

<em>ANSWER: 37.127 mil/h</em>

Part B:
Similar to what was done in Part A, the setting of the balancer is calculated below,
       setting = (80 mil/h)(1h/60 min)(63360 in/1 mil)(1 rev/81.68 in)
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3 0
3 years ago
Facts about light years
Anton [14]
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Light year is the distance that light travel can travel in one year.
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4 0
3 years ago
Read 2 more answers
a tire is rolling along a road, without slipping with a velocity v. a piece of tape is attached to the tire. When the tape is op
Kryger [21]

Answer:

The right solution will be the "2v".

Explanation:

For something like an object underneath pure rolling the speed at any point is calculated by:

⇒  v_{rolling}=v_{translational}+v_{rotational}

Although the angular velocity was indeed closely linked to either the transnational velocity throughout particular instance of pure rolling as:

⇒  \omega=\frac{v_{translational}}{r}

Significant meaning is obtained, as speeds are in the same direction. Therefore the speed of rotation becomes supplied by:

⇒  v_{rotational}=\omega \times r

On substituting the estimated values, we get

⇒                   =\frac{v_{translational}}{r} \times r

⇒                   =v_{translational}

So that the velocity will be:

⇒  v_{rolling}=v+v

⇒              =2v

4 0
4 years ago
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