Help me Guys i need the answer of this 3 question

[marccusjohn]

Help me Guys ! i need the answer of this 3 question :(

Guys ?? i really need the answer of this 3 questions .. I don't know how to answer this one .. help me guys ..


1.) Compute the electric force acting between the electron and the proton in a hydrogen atom. The radius of the electron's orbit around the proton is about 5.3x10^(-11) m.



2.) The current that flows through an incandescent light bulb immediately after it is turned on is higher than the current that flows moment later. Why?



3.) A permanent magnet is made of a ferromagnetic material with a magnetization M of about 8x10^5 A/m. The magnet is in the shape of a cube of side 2 cm.

a.) Find the magnetic dipole moment of the magnet.

b.) Estimate the magnetic field due to the magnet at a point 10 cm from the magnet along its axis.





NOTES:

1.) 5.3x10^(-11) is "5.3 times 10 raised to the exponent -11".

8x10^5 is "8 times 10 raised to the exponent 5".

2.) Problem #3 is a sample problem in University Physics by Young & Freedman (11th or 12th edition) so provide the necessary details.

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Thanks In advance

 

[Pengwuino]

We don't do your homework here. Show some effort first.

 

[marccusjohn]

huhuhuhuh :( but i need the answer .. huhuhuh :( please help me :(

 

[Clever-Name]

We will help if you show us some work towards finding it. Whining isn't going to get you any closer to an answer from us.