Quasars are more luminous than X-ray binaries, but their emission comes out at longer wavelengths, indicating cooler temperature for the accretion disk. How could a more luminous accretion flow give rise to a lower temperature

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hope this

i guess it’s a and b

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.