Answer the following :
Why have the properties of the sun remained unchanged over the last 4.5 billion years ?

Answer the following : State properties of the sun .

Answer the following : State any four properties of the sun .

Answer the following : How can scientists conclude that properties of the sun have remained unchanged since its birth ?

Answer the following questions : Fill in the blanks : The properties of the sun will change slowly in future after another ……………

Answer the following : If you are the sun , write about your properties in your own words .

Answer the following questions: Why do energy and work have the same units?

Answer the following question : Can a triangle have two obtuse angles? Why?

Answer the following questions : As per the request of one of his friends from the equator, Rahul buys 100 grams of silver at the north pole. He hands it over to his friend at the equator. Will the friend agree with the weight of the silver bought ? If not, why ?

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 .