Which statements comparing the Sun and a red supergiant are true? Select the two correct answers.(1 point)
Responses
The Sun's temperature is higher than that of a red supergiant.
The Sun's temperature is higher than that of a red supergiant.
The Sun and a red supergiant have similar luminosity.
The Sun and a red supergiant have similar luminosity.
The Sun will outlive a red supergiant.
The Sun will outlive a red supergiant.
The Sun and a red supergiant are of similar size.
The first and fourth statements are true:
- The Sun's temperature is higher than that of a red supergiant.
- The Sun and a red supergiant are of similar size.
The correct statements comparing the Sun and a red supergiant are:
1. The Sun's temperature is higher than that of a red supergiant.
2. The Sun and a red supergiant are of similar size.
The two correct statements comparing the Sun and a red supergiant are:
1. The Sun and a red supergiant have similar luminosity.
2. The Sun and a red supergiant are of similar size.
To determine these answers:
1. To compare the temperatures, you would need to find the temperature of the Sun and compare it to the temperature of a red supergiant. The temperature of the Sun is approximately 5,500 degrees Celsius, while the temperature of a red supergiant can range from 3,000 to over 6,000 degrees Celsius. Therefore, the statement "The Sun's temperature is higher than that of a red supergiant" is incorrect.
2. To compare the luminosity, you would need to find the luminosity of the Sun and compare it to the luminosity of a red supergiant. The Sun has a luminosity of 3.828 x 10^26 watts, while a red supergiant can have a luminosity that ranges widely, from tens of thousands to several million times that of the Sun. Therefore, the statement "The Sun and a red supergiant have similar luminosity" is incorrect.
3. To compare the lifespan, you would need to know the estimated lifespan of the Sun and compare it to the estimated lifespan of a red supergiant. The Sun is estimated to have a total lifespan of about 10 billion years, while a red supergiant typically has a shorter lifespan of a few million to a few hundred million years. Therefore, the statement "The Sun will outlive a red supergiant" is correct.
4. To compare the size, you would need to find the size of the Sun and compare it to the size of a red supergiant. The Sun has a diameter of about 1.4 million kilometers, while a red supergiant can have a much larger diameter ranging from tens to hundreds of times that of the Sun. Therefore, the statement "The Sun and a red supergiant are of similar size" is incorrect.