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Vladimir [108]
3 years ago
5

2) A sprig with a length of 15 cm and stores 110 J of potential energy when stretched to a new

Physics
1 answer:
Alik [6]3 years ago
4 0

Answer:

94.28 cm

Explanation:

The formula for elastic potential energy is given as;

PEel = 1/2 *k*x² where x is the displacement, k is the spring constant

Given

PEel = 110 J, k= 350 N/m  then find x

PEel = 1/2 *k*x²

110 = 1/2 * 350 * x²

110 = 175 x²

110/175 = x²

0.6286=x²

√0.6286 =x

0.7928 m = x

79.28 cm = x

New length of spring = 15 cm + 79.28 cm = 94.28 cm

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How much more intense is sound at 40 db than sound at zero db?
Gnesinka [82]
It is 10^4 times the intensity at 0 db
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4 years ago
A 66-kg fellow stands on a digital scale in an elevator that accelerates upwards from rest to 4.5 m/s in 2.00 s. show answer Inc
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Answer:

Explanation:

mass of the fellow ( m ) = 66kg

acceleration of fellow a

v = u + at

4.5 = 0 + a x 2

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Net force acting on fellow in upward direction by the surface of  elevator

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7 0
3 years ago
Which sentence provides evidence that heat travels from Earth’s mantle up to its crust?
olasank [31]

B. Earth’s outer surface is cooler than its interior layers.

Explanation:

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7 0
4 years ago
I measured my pet dog (Mickey) to be able to run the length of my backyard 500 in 12 seconds. At this rate, how many miles can m
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The dog runs  300240 miles.

<h3>What is the rate?</h3>

Rate refers to the pace at which something happens. We know that the easiest way to obtain the rate is by the use of proportion. Now we have been told that the dog is able to run 500 miles in 12 seconds.

If the dog runs 500 miles in 12 seconds

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x = 41.7 miles

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If the dog runs 41.7 miles in 1 second

The dog runs x miles in 7200 seconds

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x = 300240 miles

Learn more about proportion:brainly.com/question/2548537

#SPJ1

4 0
2 years ago
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