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igomit [66]
3 years ago
8

how many revolutions are completed by a top spinning with a constant angular velocity of 3pi radians during a 20 sec time interv

al
Physics
1 answer:
patriot [66]3 years ago
7 0

Answer:

  30

Explanation:

Assuming the velocity is 3π radians <em>per second</em>, the top will spin through an angle of ...

  (3π radians/s)(20 s) = 60π radians

Since each revolution is 2π radians, that is ...

  (60π radians)/(2π radians/revolution) = 30 revolutions

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Olin [163]

Answer:

wrong statement :  Momentum is not conserved for a system of objects in a head-on collision.

Explanation:

In a head on collision of two objects , two equal and opposite forces are created at the point of collision . These two forces create two impulses in opposite direction which results in equal and opposite changes in momentum in each of them . Hence net change in momentum is zero. In this way momentum is conserved in head on collision of two objects.

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3 years ago
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2 years ago
True or false the hotter the star the higher is absolute magnitude?
liubo4ka [24]

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6 0
3 years ago
Which of these is NOT a common building material?
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8 0
3 years ago
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A guy wire 1034 feet long is attached to the top of a tower. When pulled taut, it touches level ground 699 feet from the base of
kolezko [41]

Answer:

80.386 degrees

Explanation:

We use the cosine equation here (which is the adjacent side of the unknown angle divided by the hypotenuse

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As easy as one can imagine

8 0
2 years ago
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