Which set lists the SI base units for mass, length, and time in that order?

Which set lists the SI base units for mass, length, and time in that order?

• A. Kilogram; Meter; Second
• B. Gram; Meter; Second
• C. Kilogram; Kilometer; Second
• D. Kilogram; Meter; Kelvin

Answer: (A)

Mass, length, and time are measured in the SI base units kilogram, meter, and second, in that order. Kilogram is the base unit for mass, defined by fundamental constants; meter is the base unit for length, defined by the speed of light; and the second is the base unit for time, defined by a cesium atomic transition. The other options mix non-base units (gram is derived from kilogram, kilometer is a larger unit of length, and Kelvin is for temperature) and therefore do not list the base units in the requested order. So the correct sequence is Kilogram; Meter; Second.

Mass, length, and time are measured in the SI base units kilogram, meter, and second, in that order. Kilogram is the base unit for mass, defined by fundamental constants; meter is the base unit for length, defined by the speed of light; and the second is the base unit for time, defined by a cesium atomic transition. The other options mix non-base units (gram is derived from kilogram, kilometer is a larger unit of length, and Kelvin is for temperature) and therefore do not list the base units in the requested order. So the correct sequence is Kilogram; Meter; Second.