Question

A graph with temperature in kelvin on the x-axis from 40000 to 2500 and luminosity in lumens of the sun on the y-axis. there are labeled areas on the graph with plotted points. the area labeled supergiants has 3 points, (4900, 14000), (3000, 10000) and (2800, 100000). the area of white dwarfs lies between (35000, .1) and (7000, .0001). the area of red giants run from (6000, 10) to (2600, 100). there is a curve of points, labeled main sequence, between (25000, 10000) all the way down to (2500, .0001). which stars have low temperatures and high luminosities? red giants white dwarfs main sequence stars

Answer 1

Red giants and supergiants have low temperatures and high luminosities due to their large size.

Step-by-step explanation:

Stars with low temperatures and high luminosities are red giants and supergiants. These stars are found in the upper-right region of the H-R diagram, where temperature is low and luminosity is high. Despite their cool temperatures, red giants and supergiants are very luminous due to their enormous size, which compensates for their lower energy output per square meter.

Answer 2

The correct option is c.

Super giants tend to have both a great range of temperatures and the highest luminosities according to the given graph. They occupy the high luminosity space on the graph and have a wide temperature range, although the temperature range is not as great as that of the white dwarfs. However, the question specifically asks for both the greatest range of temperatures and the highest luminosities, so super giants are the correct choice because they dominate in terms of luminosity even though their temperature range is not the absolute widest.

let's analyze the labeled areas and their corresponding data points:

1. Super giants: This area has points that show a wide range of luminosities and temperatures. Notably, one point is at (2800 K, 100,000
`L_{sun`), which represents a very high luminosity.

2. White Dwarfs: The white dwarfs are clustered at lower luminosities and have a high range of temperatures, from about 35,000 K to 7,000 K, but their luminosities are much less compared to super giants, as they are below 1
`L_{sun`.

3. Red Giants: The red giants show a smaller range of temperatures from about 6,000 K to 2,600 K, and their luminosities are significant but do not exceed those of the super giants.

4. Main Sequence: The main sequence is a broad band extending from high temperatures and high luminosities to low temperatures and low luminosities. The upper end of the main sequence does have high luminosities, but they are not as high as the most luminous super giants.

Based on this information, the answer is Super giants.

The complete question is here:

A graph with temperature in Kelvin on the x-axis from 40000 to 2500 and luminosity in lumens of the sun on the y-axis. There are labeled areas on the graph with plotted points. The area labeled Supergiants has 3 points, (4900, 14000), (3000, 10000) and (2800, 100000). The area of white dwarfs lies between (35000, .1) and (7000, .0001). The area of red giants run from (6000, 10) to (2600, 100). There is a curve of points, labeled main sequence, between (25000, 10000) all the way down to (2500, .0001).~

Which stars tend to have the greatest range of temperatures and the highest luminosities?~

A. red giants

B. white dwarfs

C. super giants

D. main sequence.