1.

Find the pressure of a pulsar's magnetic field and compare it with the presseure of gravitational forces

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SOLUTION :The pressure of the magnetic field is equal to the energy density:
`p_(m)=w_(m)=B^(2)//2mu_(0)`
`P_(g)rav=barrhobargh=(3M)/(4piR^(3)),(gammaM)/(2R^(2)).(R)/(2)=(3gammaM^(2))/(16piR^(4))`
Substituting the values of the pulsar.s mass and radius (see Problem 14.21) we OBTAIN the VALUE of the pressure EXERTED by the gravitational forces.


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