The sun provides a handy benchmark for describing other stars. The mass of this solar system's sun gives us a unit for measuring other stars' masses. Similarly, the sun's luminosity and surface temperature define the center of the Hertzsprung-Russell Diagram (H-R Diagram). Plotting a star on this chart reliably predicts other qualities of the star, such as mass and age. The main sequence phase of a star's life cycle is that time during which hydrogen fusion takes place in its core. But in terms of the H-R Diagram, "main sequence" also refers to a roughly diagonal, slightly S-curved line stretching between the upper-left and lower-right corners on which main sequence stars chart. They maintain a predictable relationship between luminosity and temperature: the brighter, the hotter. Both of these traits increase with a star's mass; a star indicated closer to the upper-left corner will be "heavier" than our sun, while lower-right main sequence stars will be "lighter."
Red Giants
Should astronomers plot a newly discovered star in the upper-right corner of the H-R Diagram, being both bright yet cool, they'll immediately know what phase of its life cycle the star is enduring. A red giant's core, hot enough to fuse helium and even heavier elements, has pushed its shell layers so far out that they can cool into the red spectrum. They owe their great luminosity not to their temperature, but to their size: bigger stars radiate more light energy.
Cyclic AMP activates protein kinase.
<h3>What is AMP?</h3>
AMP stands for adenosine monophosphate.
5'-Adenylic acid, also known as adenosine monophosphate (AMP), is a kind of nucleotide. The ester of phosphoric acid with the nucleotide adenosine yields AMP, which is composed of a phosphate group, the sugar ribose, and the nucleobase adenine.
AMP, which is interconverted to ADP and/or ATP, is crucial for many cellular metabolic functions. Additionally, AMP plays a role in the creation of RNA. Every known type of life has AMP.
To learn more about AMP from the given link below:
brainly.com/question/12226055
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Answer:
In a free-body diagram, a box is used to represent the object, and arrows (the forces) are drawn outward from its sides.
Explanation:
Once you put all of this together, it's pretty simple to figure out which forces are acting on any given object.
The correct answer should be D.) Declines in poisonous, non-edible mushroom species in cool climates. Although question B does provide evidence that Global warming could be the cause of the declines, it still doesn't disprove the theory that overharvesting could be the cause as well. Question C could be caused by a number of things, such as deforestation, a local change in climate, removal of agricultural pests, ect. Question A supports the hypothesis that overharvesting is the cause of the decline, instead of disproving it. Hope this helped!
When we breathe, our respiratory system takes up oxygen and carbon dioxide or other useless gases go out . The oxygen combines with the haemoglobin in the blood of the circulatory system . This is transferred to all the cells of our body to get energy.
