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Sergio039 [100]
3 years ago
12

How much energy is stored in a spring with a spring constant of 390 N/m if the spring is compressed a distance of 0.45 m from it

s free length?
Group of answer choices

79 J

34000 J

39 J

180 J

88 J
Physics
1 answer:
masya89 [10]3 years ago
4 0
F=-ks
F=-(390)(.45)
F=-175.5 N

Work=force x displacement
Work= 175.5(0.45)
Work= 78.98 J

Work = ∆E =78.98 J

Answer=79J (first option)
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If you run around a circular track with a radius of 10m, what is the displacement after 3 full laps back to the start line?
Svetach [21]

Displacement will be zero.

<h3>What is displacement and how is it different from distance?</h3>

Displacement:

  1. It is the shortest distance between an object's beginning position and ending position.
  2. The quantity is a vector.
  3. It may be zero, positive, or negative.
  4. Displacement may be greater than or equal to distance.

In the given question, we start from one point and finish at the same point around the circular track. Therefore there is no distance between the initial and final points because they are the same. That's why the displacement is zero.

Distance:

  1. It is the actual path or distance that an object takes to go from its starting point to its finishing point.
  2. The quantity is a scalar one.
  3. It cannot be 0 or negative; it must be positive.
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Learn more about displacement here:

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2 years ago
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In a series circuit, all devices are constrained to a single flow of current. There can only be a single value for the current for all devices, otherwise this would violate the conservation of charge. Therefore the current must be the same across each resistor.


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The observation that energy transformations are rarely 100% efficient is seen by scientists as a violation of the Law of Conserv
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A pipe of length 6.8 m is closed at one end and sustains a standing wave at its second overtone. determine the distance between
r-ruslan [8.4K]
For a pipe closed at one end, the second overtone is the 3rd natural frequency as shown in the diagram.

For the fundamental frequency,
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Because L = 6.8 m, therefore
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