Why do stars have names

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Answer 1

Answer:

Astronomers give stars names so that they're able to identify and keep track of them more easily.

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Un herrero calienta un trozo de acero en un horno para poder forjarlo.A medida que aumenta la temperatura del metal ¿Que ocurre con su densidad?¿Aumenta o disminuye? Explica tu respuesta

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La densidad del metal disminuye a medida que se calienta . Piense en el agua . Cuando hace frío , se convierte en hielo , lo cual es muy densa . Cuando hace calor , se evapora en gas , que no es denso.

Espero que esto no es confuso , yo no soy un hablante nativo de español .

What does the doppler effect indicate about the motion of galaxies?

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When galaxies move farther away the wavelength of the light is longer causing the galaxy to shift red but if it moves closer, the wavelength of the light gets smaller causing the galaxy to blue shift. The reason that the wavelength increases or decrease is due to the doppler effect.

The mass is 2.0 kg. If the net force is 20.0 N, what is the acceleration?