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zheka24 [161]
2 years ago
14

How can you identify the north/south pole in a magnet. Is there a north/south pole in a magnetic field and if so how do we ident

ify that
Physics
2 answers:
gulaghasi [49]2 years ago
6 0
If you have 2 magnets and you try to attract them and they attract that means there opposite but if you have two magnets and you try to attract them and they repel that means they’re the same magnet
ella [17]2 years ago
4 0

Steps :-

  • Tie a little rope with the magnet centre.
  • Put the magnet holding up in air straight.
  • Put a clock magnet beside the holding of the magnet.
  • The north pole of clock pin will show the north pole of the magnet and other will show south pole .

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Explanation:

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3 years ago
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A 20.0-N weight slides down a rough inclined plane which makes an angle of 30 degree with the horizontal. The weight starts from
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Answer:

1270.64\ \text{J}

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m = Mass of object = \dfrac{mg}{g}

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g = Acceleration due to gravity = 9.81\ \text{m/s}^2

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u = Initial velocity = 0

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f = Force of friction

fd = Work done against friction

The force balance of the system is

\dfrac{1}{2}m(v^2-u^2)=(mg\sin\theta-f)d\\\Rightarrow \dfrac{1}{2}mv^2=mg\sin\theta d-fd\\\Rightarrow fd=mg\sin\theta d-\dfrac{1}{2}mv^2\\\Rightarrow fd=20\times \sin 30^{\circ}\times 150-\dfrac{1}{2}\times \dfrac{20}{9.81}\times 15^2\\\Rightarrow fd=1270.64\ \text{J}

The work done against friction is 1270.64\ \text{J}.

8 0
3 years ago
What does keplers second law of planetary monition imply
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Answer:

57dB

Explanation:

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What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?
OLEGan [10]
This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.
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