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aleksandrvk [35]
3 years ago
15

Calculate the work done.

Physics
1 answer:
Ksenya-84 [330]3 years ago
6 0
(ANSWER: 300 ft-lbs) It’s pretty easy once you understand the process. Basically all you need to do is multiply 100 and 3. As you know, 100*3=300. Therefore, the answer should be 300 ft-lbs.
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Why would an asteroid have a difficult time of holding a probe or person?
babymother [125]

The asteroid's mass is so small that it has a much smaller acceleration
due to gravity than Earth has.  That means that things weigh very very little
on the surface of an asteroid. It also means that the "escape velocity" from
an asteroid is very low, and orbital velocities are very low at any distance off
of its surface.

As an extreme example:  You know how when you walk, you naturally rise up
on the toes of one foot while you reach out with the other one to take a step ? 
All of those motions are what you learn in Earth's gravity.  On an asteroid, that
natural action of rising up on your toes might launch you into a long, high arc,
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5 0
3 years ago
. Are there human health risks from exposure (or overexposure) to X-rays? If so:
algol [13]
<h3>yes, there are human health risks caused by exposure to x rays</h3>
  • describe the main risk (s) ::: - may cause damage to cells in the body

                                                      - large doses may lead cells to be cancerous        

                                                      - causes mutations in the DNA

  • describe common sources of exposure ( or overexposure ) :::

           - natural background radiation   e.g. - cosmic rays

           - medical radiation   e.g. - CT scans & medical x - rays

           - man - made radiation   e.g. - airport security scanners

  • describe a technology, device, or behavior that can be used for protection, or to decrease exposure :::

          - x - ray beam filters

          - digital x - ray detectors

          - technologies reduce radiation doses in radiography &  

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<em>hope that helps !!</em>

3 0
3 years ago
Read 2 more answers
Which of the following statements concerning the nuclear force is false? O The nuclear force is attractive and not repulsive. O
Ulleksa [173]

Answer:

  • The nuclear force is attractive and not repulsive.
  • The nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces.

Explanation:

  • Nuclear force is the strongest existing force in the nature.
  • It has the shortest range.
  • Its main function is to hold the subatomic particles together in nature.
  • The nuclear force is created  by the exchange of pi mesons between the nucleons of an atom, but for this exchange to happen the particles must be close to one another of the order of few femtometer.
  • At about 1 femtometer the nuclear force is very strongly attractive in nature but at distance greater than 2.5 femtometer it fades away.
  • The force becomes repulsive in nature at distance less than 0.7 femtometer.
  • This force holds the likely charged protons together in the nucleus.

3 0
3 years ago
The rotational inertia I of any given body of mass M about any given axis is equal to the rotational inertia of an equivalent ho
faltersainse [42]

Answer:

Explanation:

Let mass of cylinder be M

Moment of inertia of cylinder

= 1/2 M R² r is radius of cylinder

If radius of equivalent  hoop be k

Mk² = 1/2 x MR²

k = R / √2

1.2 / 1.414

Radius of gyration = 0.848 m

b )

moment of inertia of spherical shell

= 2 / 3 M R²

Moment of inertia of equivalent hoop

Mk²

So

Mk² = 2 / 3 M R²

k = √2/3 x R

= .816 X 1.2

Radius of gyration = .98 m

c )

Moment of inertia of solid sphere

= 2/5 M R²

Moment of inertia of equivalent hoop

= Mk²

Mk² = 2/5 M R²

k √ 2/5 R

Radius of gyration = .63 R

6 0
4 years ago
Who was the first person to discover wormholes?
valentinak56 [21]

The first who discovered The Einstein Roses bridge it was discovered by Ludwig flamm in 1916 a few months after Schwarzschild published his solution and was rediscovered by Albert Einstein and his colleague Nathan Rosen which was published then in 1935

8 0
3 years ago
Read 2 more answers
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