What can you conclude about the smells of esters and carboxylic acids.
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Ответ:
Explanation:
Astronomers define star brightness in terms of apparent magnitude. How bright the star appears from Earth and absolute magnitude is how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs. (A light-year is the distance light travels in one year is about 6 trillion miles, or 10 trillion kilo meters.) Astronomers also measure luminosity, the amount of energy (light) that a star emits from its surface.
Distance of a light year = 3600 x 24 x 365.25 x 3 x
≅ 10 trillion kilo meters