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Nezavi [6.7K]
3 years ago
5

7. A student is rotating an object on a rope that is 4.5m long. If we increase the length

Physics
1 answer:
Arturiano [62]3 years ago
3 0
Um tbh i failed school so hahah
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Which came the egg or the chiken
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the chicken.

Explanation:

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Although the evidence is weak, there has been a concern in recent years over possible health effects from the magnetic fields ge
sergey [27]

Answer:

a

The magnetic field strength is  B = 2 \mu T

Explanation:

From the question we are told that

             The  length line   above the ground  is  R = 20m

              The current of the line is  I  = 200A

              The voltage of the line is V = 110kV

Generally magnetic field strength is mathematically represented as

              B = \frac{\mu_o I}{2 \pi R}

Where  \mu_0 is the permeability of free space  = 4\pi * 10^{-7} N/A^2

             B = \frac{(4\pi * 10^{-7} N/A^2) *200}{2 \pi *20}

                = (2.0*10^{-7})[\frac{200}{20} ]

               = 2*10^{-6}T

              = 2 \mu T

Earths magnetic field is approximately given as 50 \mu T

   So the percentage would be

                           = \frac{Magnetic \ Field \ Intensity \ Of  \ Line}{Earth's \ Magnetic \ Field} * 100

                          = \frac{2 \mu T }{50 \mu T } * 100

                          =4%            

         

           

             

               

7 0
3 years ago
I need help on this question!! Please answer asap!
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Answer:

hub    moon     merc   saturn   sun    galaxy    deep field

Explanation:

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Science please help!
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<span>Inertia is a property of matter
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