Question

Which of the following is an SI base unit for measuring length?

- a. Inch
- b. Gram
- c. Meter
- d. Mole

Answer 1

The SI base unit for measuring length is the meter (m), which is the standard unit of length in the SI system. Other units like the kilometer, milligram, nanosecond, and centiliter are defined in terms of their corresponding SI base units.

Step-by-step explanation:

The SI base unit for measuring length is the meter (m). The other options listed, inch, gram, and mole, are not SI base units for length. Gram is a unit of mass, the mole is a unit for the amount of substance, and the inch is a unit of length in the US customary system, not the SI system.

Let's further define a few units in terms of their SI base units:

• Kilometer (km): A unit of distance equal to 1,000 meters (10³ m).
• Milligram (mg): A unit of mass equal to one-thousandth of a gram (10⁻³ g).
• Nanosecond (ns): A unit of time equal to one-billionth of a second (10⁻⁹ s).
• Centiliter (cl): A unit of volume equal to one-hundredth of a liter (10⁻² l).