When conducting scientific research, any information that is found must be analyzed to determine its validity. john believes that ufos and extraterrestrial life exist. the excerpts below are an eyewitness account of ufo activity in south carolina. which of these observations is valid?
a.
“i can tell from a firsthand experience that yes, ufos do exist.”
b.
“one thing for sure is that they were ufos and they had to be piloted by some type of intelligent life.”
c.
both of these observations are valid.
d.
neither of these observations is valid.

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.