Answer the following :
Describe the evolution and end stages of stars having initial mass between 8 and 25 times the mass of the sun .

Answer the following : How does the evolution of star finally stop ?

Answer the following : Explain end stages of stars having mass larger than 25 times mass of the sun .

Answer the following : Explain the life cycle of stars having initial mass less than 8 times mass of the sun .

Answer the following : Explain the process of evolution of stars .

Answer the following : Distinguish between neutron star and black hole .

Using the principle of homogeneity of dimensions, find which of the following relation is correct? [T is the period, a is the redius of the orbit and M is the mass of the sun.

Answer in one sentence : What are the three end stages of stars ?

Answer the following What is the relation between frequency and time period of a sound wave?

Solve the following examples / numerical problems: Find the magnitude of the gravitational force between the Sun and the earth.( Mass of the Sun =2xx10^30 kg, mass of the earth = 6xx10^24 kg and the distance between the centres of the Sun and the earth = 1.5xx 10^11 m, G =6.67 xx10^-11 N-m^2 /kg^2 ).

Answer the following : Name the following : Huge clouds of gas and dust present in the empty spaces between stars in a galaxy .