Re: [問題] 單班物理作業......

看板b97902HW作者lemonace (Lentha)時間15年前 (2008/09/28 22:32)推噓5(5推 0噓 6→)

留言11則, 6人參與討論串2/2 (看更多)

※ 引述《fishead1116 (2D平面魚)》之銘言： : 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) 脈衝星是中子星星並會放出X射線和其他輻射使地球依照他們的轉速而收到固定間隔的輻射，有些的間隔更只有一毫秒。蟹狀脈衝星在獵戶星座蟹狀星雲中正以33.085毫秒週期自轉。據估計它的赤道半徑為15公里，恰為一般中子星的平均。 : (a) What is the value of centripetal acceleration of an object on the surface : at the equator of the pulsar? (a)一個在此脈衝星赤道表面的物體的向心加速度為多少? : (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? (b)許多脈衝星都被觀測到周期漸漸增加，稱為"spin down"。蟹狀脈衝星的減緩率為 3.5*10(-13次方)秒度每秒，也就是如果依照這樣減慢率，它將會在9.5*10(10次)秒(大約3000年以後)停止自轉。一個在這脈衝星赤道表面的物體的切線加速度是多少? 粗糙翻譯，有錯還請強者更正 #) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.214.202

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martinku

09/28 22:46, , 1^F

09/28 22:46, 1^F

※ 編輯: lemonace 來自: 140.112.214.202 (09/28 23:05)

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lemonace

09/28 23:56, , 2^F

09/28 23:56, 2^F

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fishead1116

09/29 00:27, , 3^F