Which of the following is the SI unit used to measure volume?

• A. liter (L)
• B. milliliter (mL)
• C. gallon (gal)
• D. cubic meter (m^3)

Answer: (D)

Verified step by step guidance

1. Understand that volume is a measure of the amount of space an object or substance occupies.
2. Recall that the International System of Units (SI) defines standard units for all physical quantities, including volume.
3. Recognize that the SI base unit for length is the meter (m), and volume is derived from length measurements cubed.
4. Therefore, the SI unit for volume is the cubic meter, expressed as \(m^{3}\), which represents a cube with edges of one meter in length.
5. Note that units like liter (L), milliliter (mL), and gallon (gal) are commonly used for volume but are not SI units; liters are accepted for use with SI but are not the SI base unit.