In the International System of Units SI it is defined as a derived unit of 1 joule per second ,  and is used to quantify the rate of energy transfer. Important powers that are measured in microwatts are typically stated in medical instrumentation systems such as the EEG and the ECG , in a wide variety of scientific and engineering instruments and also in reference to radio and radar receivers. Northern Arizona Wind and Sun. This same amount of energy would light a watt bulb for 2. Retrieved 14 February A century of sonar: Planetary oceanography, underwater noise monitoring, and the terminology of underwater sound. Hidden categories: CS1 French-language sources fr Articles with short description. This unit is often used for large power plants or power grids.
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