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各位大家好...我是一個有點遲鈍的人

最近要讀普物  有一題看了半天還是看不懂

想請問一下到底是該怎麼辦  謝謝:

A pulsar is a rapidly rotating neutron star that emits a radio beam

the way a lighthouse emits a light beam.

We receive a radio pulse for each rotation of the star.

The period T of rotation is found by measuring the time between pulses.

The pulsar in the Crab nebuka has a period of rotation of T=0.033 s

that is increasing at the rate of 1.26 * 10^(-5) s/y.

(A) What is the pulsar's angular acceleration α?

(B) If α is constant, how many years from now will the pulsar stop rotating?

(C) The pulsar originated in a supernova explosion seen in the year 1054.

     Assuming constant α, find the initial T.

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