If p : girls are haapy, q : girls are playing, express the following sentences in symbolic form : (i) Either the girls are happy or they are not plyaing. (ii) Girls are unhappy but they are playing. (3) It is not true that the girls are not playing but they are happy.
An isolated triple star systerm consists of two identical stars, each of mass m and f fixed star of mass M . They revolve around the central star in the same circular orbit to radius r . The orbiting stars are always at opposite ends of a diameter of the orbit. The time period of revolution of each star around the fixed is equal to:
The two stars in a certain binary star system move in circular orbits The first star alpha moves in an orbit of radius 1.00 xx 10^(9)km The other star beta moves in an orbit of radius 5.00 xx 10^(8)km What is the ratio of masses of star beta to the star alpha ? .
A Shooting Star is a
Three stars A, B, C have surface temperatures T_A , T_B ,T_C respectively. Star A appears bluish, star B appears reddish and star C yellowish. Hence,
