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Cerrena [4.2K]
3 years ago
13

When we see a star in the night sky, we are actually seeing how it was sometime in the past. This is because light takes time to

travel from the star to Earth. Light travels 9.5 × 1015 m in one year. This distance is called 1 light year. When an astronomer sees the star Betelgeuse, which is approximately 6.08 × 1018 m from Earth, how long ago did the star appear the way it does to her today?
Biology
2 answers:
Tems11 [23]3 years ago
8 0

Solution -

The correct answer is  640 years

Step by Step Solutions -

The speed of light to travel some distance = 9.5 × 1015 m /year

Star Betelgeuse is at a distance of 6.08 × 1018 m  

The time taken by light to travel = distance /speed

= 6.08 × 1018 m  /9.5 × 1015 m /year

= 640 year.  

irina1246 [14]3 years ago
3 0
9.5 x 1015 = 9642.5
<span>6.08 × 1018 = 6189.44
  If you take these two problems, and then subtract, and find out the difference between the two distances, then you should be able to get your answer.

 Hope this helps!</span>
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Answer:

Verdadero

Explanation:

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Entonces el alelo dominante expresa la característica que resulta dominante, mientras que el alelo recesivo expresa la característica recesiva.

Genotipo:

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  • Heterocigota -------------------> Expresa el caracter dominante (Ambos alelos estan presentes, pero el dominante es quien se expresa)
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Por ejemplo, si tenemos dos fenotipos rojo y amarillo, y sabemos que el color esta codificado por un gen dialelico llamado M. También supongamos que no sabemos qué alelo expresa qué color. Teniendo solo estos datos, no podemos decir si el rojo es el color dominante o si el amarillo lo es.

Sin embargo, si tenemos los siguientes genotipos acompañando esta información:

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Answer:

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Number of half lives = Time elapsed / half life

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At first half life = 100 g/ 2 = 50 g

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