Physics 441/541: Homework Questions Due April 26th

1

Assume that pulsars radiate as magnetic dipoles given by Equation 15.28.
a) Show that, long after formation, a pulsar slows down according to P proportional to t^1/2. (approximately)
b) Using the result from part a), show that the luminosity of the pulsar decreases approximately as

L proportional to t^-2.

2

Compute the differential tidal force on a person 3000km from a 10 solar mass black hole. (Assume the person’s mass is 100 kg, and the height is 2 m.

3

Problem 15.23