32 दिमाग और 10 पेट 1 जानवर के पास | Animal facts in Hindi | Brain related facts | explore the fact

Two planets of equal mass orbit a much massive star (figure). Planet m_(1) moves in circular orbit of radius 1 xx 10^(8) km with period 2 yr . Planet m_(2) moves in an elliptical orbit with closed distance r_(1) = 1 xx 10^(8) km and farthest distance r_(2) = 1.8 xx 10^(8) km , as shows. (a) Using the fact that the mean radius of an elliptical orbit is the length of the semi-major axis, find the period of m_(2)'s orbit. (b) Which planet has the greater speed at point P ? Which has the greater total energy? (c ) Compare the speed of planet m_(2) at P with that at A .