Imagine that you take images of two main sequence stars that have the same mass. from your observations, both stars appear to be the same age. consider the following possible interpretations that could be made from your observations.
a. both stars are the same age and the same distance from you.
b. both stars are the same age but at different distances from you.
c. the stars are actually different ages but at the same distance from you.
d. the star that is closer to you is actually the older of the two stars.
e. the star that is farther from you is actually the older of the two stars.

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.