Rank these stars in terms of temperature from coolest to hottest star a emits mostly ultraviolet light along with visible and infrared light star b emits mostly visible light, along with some infrared light and a tiny bit of ultraviolet light star c emits mostly infrared light with some red light

The list of stars from coolest to hottest is:

Explanation:

The temperature of light depends on the wavelength. Longer wavelengths are associated with cooler temperatures and shorter wavelengths with hotter temperatures. Infrared light is emitted in a wavelength longer than that of red visible light, while ultraviolet light has a shorter wavelength than the blue light at the other end of the visible spectrum.

This means that the emission spectrum of Star A is the most energetic (and therefore hottest) as it's light is mostly of a shorter wavelength.

because the center-south is called the heart of the country

81 is a composite number.