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Birth of Stars

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The larger the mass of a star the faster is its _________

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Solution

The larger the mass of a star the faster is its rate of evolution .

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Q. Search and you will find.
a. Our galaxy is called..................
b. For measuring large distances.................... is used as a unit.
c. The speed of light is .................. km/s
d. There are about ................ stars in our galaxy.
e. The end stage of the sun will be .....................
f. Stars are born out of ............... clouds.
g. Milky way is a .............. galaxy.
h. Stars are spheres of ................. gas.
i. The masses of other stars are measured relative to the mass of the ..................
j. Light takes ........................... to reach us from the moon.
k. The larger the mass of a star the faster is its.................
l. The number of fuels used in the life of a star depends on its .......................

Q. Statement 1: The masses of the stars are measured relative to the mass of the sun.

Statement 2: The larger the mass of a star, the faster is its rate of evolution.

Q. The larger the _____ of a star, the ______ is its evolution.

Q. Distance between centres of two stars is

10 a

. The masses of these stars are M and

16

M and their radii are a and

2

a, respectively. A body is fired straight from the surface of the larger star towards the smaller star. What should be its minimum initial speed to reach the surface of the smaller star?

Q. Distance between the centres of two stars is

10 a

. The masses of these stars are

M

16 M

and their radii

a

2 a

respectively. A body of mass m is fired straight from the surface of the larger star towards the smaller star. What should be its minimum initial speed to reach the surface of the smaller star? Obtain the expression in terms of

G, M

a .

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