Because it is important to know the composition of the object
Density is the ratio of the mass of a sample to the volume occupied by that mass, and expresses how much mass there is per unit volume of a given portion of matter. Density is a physical property of extreme importance in the characterization, identification and use of substances or materials.
Answer:
opinion polls have been around longer than social media ( A )
Explanation:
Opinion poll is a human research survey of public opinion about an activity or project to be engaged in. this is usually carried out on a sample of the kind of individuals whose opinion is needed to successfully carry out the project or activity.
opinion poll have been around long before the birth of social media. it is as old as man because it was even practiced in the stone ages. in the 21st century opinion polls are carried through emails, google and other forms which also includes social media of recent.
Kim II-Sung invaded South Korea. He informed both the Soviet Union and China since they were his allies.
"Colonial America offers religious freedom." was the primary reason colonists came to Massachusetts, since Britain did not allow them to live the lives they wished.
