Question

What are the SI base units of length, mass, and time?

(a) Length: kilogram, Mass: meter, Time: second.
(b) Length: meter, Mass: kilogram, Time: second.
(c) Length: second, Mass: meter, Time: kilogram.
(d) Length: kilogram, Mass: second, Time: meter.

Answer 1

The SI base units for length, mass, and time are the meter (m), kilogram (kg), and second (s), respectively, thus the correct answer is (b).

Step-by-step explanation:

The SI base units of length, mass, and time are essential for various scientific disciplines. In the case of mechanics, fluids, and waves, all relevant physical quantities can be expressed using these units. The correct SI base units for these are:

• Length: meter (m)
• Mass: kilogram (kg)
• Time: second (s)

Therefore, the answer to the question is (b) Length: meter, Mass: kilogram, Time: second.

Using SI units, which are part of the metric system, is advantageous because they use powers of 10 for easy calculation and conversion between sizes, making it simple to relate quantities over the vast ranges encountered in nature.