Express the Number in Scientific Notation

question 21

Multiple Choice

Express the number in scientific notation.
-0.000639

---

Definitions:

Liquid-cooled

A method of heat dissipation that uses a circulating fluid, typically water or coolant, to remove heat from components.

Air-cooled

Pertaining to a method of cooling machines, engines, or electronic devices by circulating air to remove heat.

Output Frequency

The frequency of the signal or current output by a device or circuit, which can vary based on the input or system design.

Stator Poles

Components of an electric machine, such as a motor or generator, that are stationary and create a magnetic field which interacts with the rotor to induce motion or generate electricity.