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What is revolution per minute?

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**Revolutions per minute** (RPM) is a unit of rotational speed that indicates the number of full rotations completed by an object around a fixed axis in one minute. It's commonly used to measure the rotational speed of mechanical components, such as engines, motors, and other rotating equipment.

**Automobiles:**RPM is used to measure the speed at which an engine's crankshaft is rotating. Higher RPMs generally indicate a higher engine speed.**Machinery:**In industrial settings, RPM is used to monitor the speed of equipment like drills, lathes, and conveyors to ensure they are operating within safe and efficient limits.**CD/DVD Players:**The RPM indicates how fast the disc is spinning, which can affect data read/write speeds.

**To radians per second (rad/s):**Since there are $2\pi$ radians in a full rotation and 60 seconds in a minute, you can convert RPM to rad/s using the formula:$\text{rad/s} = \text{RPM} \times \frac{2\pi}{60}$

**To hertz (Hz):**Hertz is the unit of frequency, and 1 Hz equals 1 rotation per second. You can convert RPM to Hz using the formula:$\text{Hz} = \frac{\text{RPM}}{60}$

Understanding RPM is crucial in various fields to ensure that devices are functioning properly and efficiently.