推 lockercho:我發現大家都是這題看不懂XDDD 09/28 21:21
推 martinku:有物理系強者幫我秒了它 09/28 21:52
→ fishead1116:物理強者也行 09/28 22:00
推 tempTTP1:那順便請問第64題是平拋還是直線?若是平拋,好像沒給高度 09/28 23:53
第3章的第70題看不懂耶
有英文強者可以翻譯一下嗎?
附上原文
Pulsars are neutron stars that emit X rays and other radiation in such a way
that we on Earth receive pulses of radiation from pulsars at regular intervals
equal to the period that they rotate. Some of these pulsars rotate with
periods as short as 1 ms!! The Crab Pulsar ,located inside the Crab Nebula in
the consellation Orion, has a period currently of length 33.085ms. It is
estimated to have an equatorial radius of 15km , an average radius for a
neutron star(以上是題目敘述)
(a) What is the value of centripetal acceleration of an object on the surface
at the equator of the pulsar?
(b) Many pulsars are observed to have periods that lengthen slightly with
time, a phenomenon called "spin down ". The rate of slowing of the Crab
Pulsar is 3.5 * 10(-13次方)s per second which implies that if this rate
remains constant, the Crab Pulsar will stopp spinning in 9.5*10(10次)s
(about 3000 years from today). What is the tangential acceleration of
an object on the equator of this neutron star?
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