What type of star has an absolute brightness of 5 and a surface temperature around 3,000 °c?

select one:
a. supergiant
b. giant
c. main sequence
d. dwarf

The answer is A : Supergiants

In the above graph absolute brightness is marked on y-axis and surface temperature is marked on x-axis.

To find out what type of star has an absolute brightness of 5 and a surface temperature around 3,000 °C, we will draw a straight line from x axis which represents a temperature of 3,000 °C and another straight line from y-axis which represents absolute brightness of 5.

From the attached graph we can see that these 2 lines meet in the region shown by Supergiants

Therefore we can say that, Supergiants has an absolute brightness of 5 and a surface temperature around 3,000 °C

U whay do you need with?

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane