Why does the size of a white dwarf decrease with increasing mass?

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A more massive white dwarf has a stronger gravitational force that compresses its mass to a greater density. The degeneracy pressure that supports a white dwarf against collapse increases as the density increases, and the balance between degeneracy pressure and gravity is reached such that the a more massive white dwarf is smaller in radius.

Physics & Space Science

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Physics & Space Science

What was the significance of the end of the era of nucleosynthesis, when the universe was about 5 minutes old?

A) The basic chemical composition of the universe had been determined. B) The proportions of dark matter and luminous matter had been determined. C) It marks the time at which the first stars formed. D) It marks the time at which the expansion of the universe had settled down to its current rate.

Physics & Space Science

Stand a broom upright on the end of its pole and let it topple to the floor. Repeat, but with the bristles end on the floor. The faster fall will be the broom standing on its

A) pole-end. B) bristles-end. C) the same either way.

Physics & Space Science

The length of a telescope is 2.00 m and the focal length of the objective is 2.0 cm. What is the focal length of the eyepiece?

A) 200 cm B) 202 cm C) 101 cm D) 2.0 cm E) 198 cm

Physics & Space Science