SI units and prefixes Knowledge-Based Download PDF

Questions

1. 1.

   Under the rules of the International System of Units (SI), decimal prefixes for mass must be attached to the root unit "gram" rather than the base unit "kilogram". Which of the following is the correct SI representation of $10^{-6}\text{ kg}$?

   • A) 1 mg
   • B) 1 $\mu\text{g}$
   • C) 1 $\mu\text{kg}$
   • D) 1 ng
2. 2.

   Which of the following physical quantities is classified as an SI derived quantity rather than an SI base quantity?

   • A) Electric current
   • B) Thermodynamic temperature
   • C) Luminous intensity
   • D) Electric charge
3. 3.

   When an SI prefix is attached to a unit raised to a power, the exponent applies to the entire prefixed unit. What is the equivalent of $1\text{ m}^3$ expressed in cubic centimeters ($\text{cm}^3$)?

   • A) $1 \times 10^6\text{ cm}^3$
   • B) $1 \times 10^3\text{ cm}^3$
   • C) $1 \times 10^2\text{ cm}^3$
   • D) $1 \times 10^9\text{ cm}^3$
4. 4.

   Density is defined as mass per unit volume. Which of the following is the coherent SI derived unit of density?

   • A) $\text{g}/\text{cm}^3$
   • B) $\text{g}/\text{mL}$
   • C) $\text{kg}/\text{m}^3$
   • D) $\text{g}/\text{L}$
5. 5.

   Which of the following physical quantities is measured using an SI base unit that inherently contains a metric prefix in its standard name?

   • A) Electric current
   • B) Thermodynamic temperature
   • C) Amount of substance
   • D) Mass
6. 6.

   Which of the following combinations of SI base units is equivalent to the derived unit of energy, the joule ($\text{J}$)?

   • A) $\text{kg}\cdot\text{m}/\text{s}^2$
   • B) $\text{kg}\cdot\text{m}^2/\text{s}^2$
   • C) $\text{kg}\cdot\text{m}^2/\text{s}^3$
   • D) $\text{kg}/(\text{m}\cdot\text{s}^2)$
7. 7.

   How many nanometers ($\text{nm}$) are equivalent to a length of $0.052\text{ millimeters}$ ($\text{mm}$)?

   • A) $5.2 \times 10^{-8}\text{ nm}$
   • B) $5.2 \times 10^{-5}\text{ nm}$
   • C) $5.2 \times 10^1\text{ nm}$
   • D) $5.2 \times 10^4\text{ nm}$
8. 8.

   Which of the following measurements represents the greatest mass?

   • A) 850 milligrams
   • B) 0.025 kilograms
   • C) 4200 micrograms
   • D) 1.5 grams
9. 9.

   Which of the following lists consists exclusively of SI base units?

   • A) Liter, gram, second, kelvin
   • B) Meter, gram, degree Celsius, mole
   • C) Kilogram, meter, kelvin, mole
   • D) Centimeter, kilogram, second, degree Celsius
10. 10.

    Which of the following correctly pairs a metric prefix with its numerical multiplier?

    • A) Micro- ($\mu$): $10^{-6}$
    • B) Milli- ($\text{m}$): $10^{-2}$
    • C) Nano- ($\text{n}$): $10^{-12}$
    • D) Pico- ($\text{p}$): $10^{-15}$