CMS SI Units & Prefixes 2

Question 1

The prefix 'centi-' equals which power of ten?

Accepted Answer

10⁻²

Answer

Centi- means 10⁻², so one centimeter is one-hundredth of a meter.

Question 2

Which SI unit measures the amount of substance?

Accepted Answer

Mole

Answer

The mole (mol) is the SI base unit for amount of substance, defined relative to Avogadro's number.

Question 3

What does the SI prefix 'mega-' represent?

Accepted Answer

10⁶

Answer

Mega- represents 10⁶, meaning one million, as in megabytes or megahertz.

Question 4

The pascal (Pa) is the SI derived unit for:

Accepted Answer

Pressure

Answer

The pascal measures pressure, defined as one newton per square meter (N/m²).

Question 5

Which SI prefix is abbreviated with a lowercase 'u' in ASCII contexts?

Accepted Answer

Micro

Answer

Micro (µ) is represented as 'u' in ASCII because the Greek letter µ is unavailable on some systems.

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