Why can we say a star spends its life trying to maintain equilibrium?

What will be an ideal response?


A star is only stable when the inward pull of gravity is balanced by the outward pressure of radiation from the core. When the star is balanced, it is in hydrostatic equilibrium.

Physics & Space Science

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A silver conductor



Physics & Space Science

Considering only the horizontal portion of the seats, what is the average surface area of all the seats in a football stadium that seats 100,000 spectators?

a.
b.
c.
d.
e.

Physics & Space Science

Some regions along the plane of the Milky Way appear dark because

A) there are no stars in these areas. B) stars in that region are hidden by interstellar gas. C) stars in that region are hidden by dark dust particles. D) many brown dwarfs in those areas absorb light which they turn into heat. E) many black holes absorb all light from those directions.

Physics & Space Science

The separation of white light into its component

colors is called a) dispersion. b) polarization. c) diffraction. d) refraction.

Physics & Space Science