精品偷拍一区二区三区,亚洲精品永久 码,亚洲综合日韩精品欧美国产,亚洲国产日韩a在线亚洲

  • <center id="usuqs"></center>
  • 
    
  • Suppose our Sun eventually collapses into a white dwarf,losing about half its mass in the process,and winding up with a

    Suppose our Sun eventually collapses into a white dwarf,losing about half its mass in the process,and winding up with a radius 1.0% of its existing radius.Assuming the lost mass carried away no angular momentum,what would the Sun's new rotation rate be?(Take the Sun's current period to be about 30 days.) What would be its final KE in terms of its initial KE of today?
    英語人氣:496 ℃時間:2020-04-14 10:40:57
    優(yōu)質(zhì)解答
    質(zhì)量損失不帶走角動量 角動量守恒 Jw=衡量 球體的轉(zhuǎn)動慣量J=2mR²/5 所以新的自傳角速度為原角速度的20000倍 所以速度是20000/30rad每天
    動能W=Jw²/2 最終動能變?yōu)楝F(xiàn)在的20000倍
    我英語不太好.
    我來回答
    類似推薦
    請使用1024x768 IE6.0或更高版本瀏覽器瀏覽本站點,以保證最佳閱讀效果。本頁提供作業(yè)小助手,一起搜作業(yè)以及作業(yè)好幫手最新版!
    版權(quán)所有 CopyRight © 2012-2024 作業(yè)小助手 All Rights Reserved. 手機(jī)版