Megahertz (MHz)
The megahertz, symbol MHz, equals one million hertz and is commonly used to describe radio frequencies, microprocessor clock speeds, and wireless communications. As technology advanced from kilohertz applications, the 20th century saw the introduction of megahertz, providing a practical scale for high-frequency signals. It is especially relevant in radio, television, mobile networks, and computing. The unit ensures clarity and precision when dealing with millions of cycles per second, making it indispensable for engineers, technicians, and hobbyists alike.
Revolutions per Second (rps)
Revolutions per second (rps) measures the number of complete rotations or cycles an object makes in one second. While the previous units describe frequency mainly for waves or signals, rps is widely used in mechanics, engineering, and rotational dynamics. Unlike hertz, which can describe any periodic phenomenon, revolutions per second (RPS) specifically applies to rotational motion. Its historical use dates back to early clockwork mechanisms, mills, and engines, evolving into modern applications such as motor speed measurements, centrifuges, and turbines. RPS provides a tangible understanding of rotational speed, making it valuable for both practical engineering tasks and educational purposes.