Which of the following reasons best describes the need for standards of measurement?
before standards of measurement, using body parts was very inappropriate and people got their feelings hurt.
before standards of measurement, people's feet were dirty, so the measurement of a foot was stinky.
before standards of measurement, measurements of the same kind would differ from person to person.
before standards of measurement, measurements made by random body parts were exact from person to person and really there was never a need to change it, so this was unnecessary.
before standards of measurement, you couldn't tell what a gazook was.

Before standards of measurement, measurements of the same kind would differ from person to person.

The correct option would be the third one which says measurements differed from person to person.

Explanation:

There was a need to change the standard of measurement because earlier body parts be used for measuring certain quantity. But since the body parts have different sizes and shapes for different people the measurement of quantity would also differ from one person to another person.

Hence this difference in quantity for different people was the reason for the need of new standards of measurement.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→