a chronograph
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A chronograph is typically used to measure the speed of a bullet. This device calculates the bullet's velocity by timing how long it takes to pass through two sensors placed a known distance apart. The speed is then calculated based on this elapsed time.
An instrument used to measure the speed of rotation is a tachometer. An instrument used to measure correct shape or dimensions is a caliper or a micrometer.
An anemometer is a device used to measure the speed of wind. It typically consists of cups or blades that rotate in the wind and are connected to a gauge or display that indicates the wind speed.
An instrument commonly used to measure speed is a radar gun, which uses radio waves to calculate the speed of an object in motion. Radar guns are often used by law enforcement to monitor vehicle speed on roads.
The instrument used to measure temperature is called a thermometer.
Thermometer is the instrument used to measure average thermal energy.