Two stars have the same color, but differ by 5 magnitudes in absolute magnitude. What stellar property must be different in the two objects and by how much?

The property that must be different in both stars is their luminous.

One must be 100 times as luminous as the other

Explanation:

The brightness of a star is measured in terms of apparent magnitude i.e. how bright the star appears from distant (i.e not real brightness). A star may appear 10x bright from afar but it's real brightness is not up to that, this term is referred to as magnitude. While the luminosity of the star is the star's true brightness measured from its place in the universe.

In astronomy, five magnitudes' difference is defined as having a brightness ratio of 100.

answer/// sequence of operations that requires the longest time for completion';

among other factors, composers started writing dynamic markings in their scores because "new instruments allowed for more dynamic ranges and contrast."

dynamics allude to the loudness or softness of music. dynamics offer an approach to demonstrate articulation in sheet music. they to drive the enthusiastic substance of music through volume and force. maybe you could alter both the volume and the shading profundity on your screen at the same time. we can likewise think about the force side of elements as the quality of a note. a few notes are intended to be played delicately and gently, while others are intended to be played all the more firmly.  

some dynamics markings have a letter 'm,' which remains for mezzo, signifying 'medium.' so a mezzo piano unique stamping resembles this (mp) and intends to play medium calm, while a mezzo specialty dynamic resembles this (mf) and intends to play medium loud.