Protostars start off more luminous than the main sequence stars they become

Indicate whether the statement is true or false


TRUE

Physics & Space Science

You might also like to view...

Comets are made mostly of

A) rock. B) hydrogen gas. C) rock and metal. D) metal. E) rock and ice.

Physics & Space Science

Which of the following best describes why a white dwarf cannot have a mass greater than the 1.4-solar-mass limit?

A) Electron degeneracy pressure depends on the speeds of electrons, which approach the speed of light as a white dwarf's mass approaches the 1.4-solar-mass limit. B) White dwarfs get hotter with increasing mass, and above the 1.4-solar-mass limit they would be so hot that even their electrons would melt. C) White dwarfs are made only from stars that have masses less than the 1.4-solar-mass limit. D) The upper limit to a white dwarf's mass is something we have learned from observations, but no one knows why this limit exists.

Physics & Space Science

A 2.00-qt bottle of soda is on sale for $1.29. What should be the price of a 2.00-L bottle of the same soda to yield the same value? (1.00 qt = 0.947 L)

What will be an ideal response?

Physics & Space Science

An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. If the two objects stick together, what is the speed of the combined object, of mass 4m, after the collision?

1.0 2.v/2 3.v 4.2v

Physics & Space Science