1.一昼夜为6小时 即自转T=6h=6*3600s=21600s
重力小10%,向心力公式mR(2∏/T)^2=10%GMm/R^2
m约掉得(4∏^2)/T^2=0.1GM/R^3
(3/4∏)*(40∏^2)/GT^2=GM/(4/(3*∏R^3))=密度
得答案
2.卫星:a1=GM/r^2,a1=(v^2)/r 得v1=√(GM/r)
a2=GM/R^2,v3=√(GM/r)
比值如上
1.一昼夜为6小时 即自转T=6h=6*3600s=21600s
重力小10%,向心力公式mR(2∏/T)^2=10%GMm/R^2
m约掉得(4∏^2)/T^2=0.1GM/R^3
(3/4∏)*(40∏^2)/GT^2=GM/(4/(3*∏R^3))=密度
得答案
2.卫星:a1=GM/r^2,a1=(v^2)/r 得v1=√(GM/r)
a2=GM/R^2,v3=√(GM/r)
比值如上