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jekas [21]
2 years ago
14

How do the main sequence stages of these two sizes of stars differ?

Biology
1 answer:
xxTIMURxx [149]2 years ago
5 0
Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the less massive), considerably more than the age of the universe. ^ 

Small, relatively cold, low mass red dwarfs burn hydrogen slowly and will burn for hundreds of billions of years 

Massive hot supergiants will live for just a few million years. 

A mid-sized star like the Sun will remain on the main sequence for about 10 billion years. Hope tis helps!!
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You find a fossil that you think is about 350 million years old. You decide to use 235U to date a volcanic ash bed just below th
devlian [24]

Answer:

I would expect that the sample has only 50% of the original 235 U.

Explanation:

That is because 235 U has a half-life of 700 million years and I expect that my sample be 350 million years old. 350 is half of 700.

8 0
2 years ago
How does the concentration of salt in water affect the rate of osmosis?
Nata [24]
The concentration of salt in water affects the rate of osmosis because it will determine how much water should be transported or excreted or to be taken in. The cellular process is keen to the salt concentration of its system thus making sure to maintain balance between the salt concentration the right amount of water must also be in its area of release for any expected occurences.
Osmosis then is the movement of water particles from which has water and from which has not and to provide it with the sufficient H2O.
7 0
2 years ago
Last week you were wondering what Jessica and Tom's babies might look like with respect to their eyebrows and earlobes (both Tom
mash [69]

Answer:

25%

Explanation:

The possible genotypes and phenotypes are:

  • EE or Ee: thick eyebrows
  • ee: thin eyebrows
  • FF or Ff: free earlobes
  • ff: attached earlobes

Tom and Jessica have thick eyebrows and free earlobes. Tom's mother has attached earlobes, so Tom must have inherited an <em>f</em> allele from her, and because he has free earlobes he must be heterozygous<em> Ff. </em>We assume Jessica is homozygous for free earlobes <em>FF</em>.

Tom's mother and Jessica's father have thin eyebrows, so they are both <em>ee</em> and therefore both Tom and Jessica must be heterozygous <em>Ee</em>.

From the above information, Tom has the genotype EeFf and Jessica is EeFF. If you do a Punnett Square of this cross, you'll get that the probability of having a child with free earlobes and thin eyebrows (eeF_) is 25%.

6 0
1 year ago
Roots have all of the following functions EXCEPT to ____.
vodka [1.7K]
The roots do absorb water and is the anchors the plant to stand it up. But it does not make food by itself
5 0
2 years ago
for some people, alcohol can cause an uncontrolled __________ of the eyes, making good vision almost impossible.
Nimfa-mama [501]

The correct answer is Vibration.

This is a condition in which there is a involuntary eye movement. In this the eye seems to be dancing eye and the vision is not clear. The vibration in eyes is due to consumption of alcohol. In normal condition the blinking of eyes is voluntary but due to consumption of alcohol the condition changes and the blinking of eyes becomes involuntary(neurological disorder).

3 0
2 years ago
Read 2 more answers
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