You go to the doctor and if he/she tells you that you are healthy , then you know if you have enough protein needed in your body system.
Normal person needs about 56 gm of protein per day
A ratio is used; The RDA reccomends that 10-35% of ones daily calorie intake should come from protein.
it is none of those it is scientists
To determine if people are related
Many people do to determine which element is in a substance ex: me, scientists
They look for the animal bones which are found in proximity to their settlements.
That is virtually impossible to determine because of the sheer number of people and the various ways to measure intelligence.
The earliest units of length were done using fingers, hands and forearms. Volume was done by filling containers with seeds or stones which were then counted to determine the measure.
Scientist test this by measuring the radioactive decay of Carbon 14 to Nitrogen 14. Good for up to 70,000 years. Since you didn't specify, scientists also measure dead people by liver temperature to figure out how long they have been dead.
Standardized units of measure are important to engineering because if everyone was using different measurement systems, dimensions of different objects and inventions wouldn't be converted correctly from the inventor to other inventors or manufacturers. (Had to be fixed because who ever wrote the originally answer was a a$$ hole)
The earliest units of length were done using fingers, hands and forearms. Volume was done by filling containers with seeds or stones which were then counted to determine the measure.
Theinch-pound system is a helpful way for scientists and regular people measure and construct things throughout our daily lives.
However or why reason they would use this, scientists have used carbon dating to determine how old (or the age) of something.
You can measure how "famous" someone is by how many people know them. So by taking a poll of different people you can determine whether YOU would consider her "famous".