How is it possible for white dwarfs to have a lower luminosity than the sun even though it is much cooler?
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Ответ:
White dwarfs have an extremely small surface area to radiate this heat from, so they cool gradually, remaining hot for a long time.
Explanation:
As a white dwarf cools, its surface temperature decreases, the radiation which it emits reddens, and its luminosity decreases.
Ответ:
Changes in Respiratory System. The short-term effect of exercise on respiratory system is usually quite extensive and that is mainly due to the changes in the concentration of oxygen and carbon dioxide in the blood. It is due to these changes that you will notice your breathing rate go up quickly
Explanation: