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2. Geiger counter - Wikipedia

   en.wikipedia.org/wiki/Geiger_counter

   The sound of a geiger counter. A Geiger counter (/ ˈɡaɪɡər /, GY-gər; [ 1 ] also known as a Geiger–Müller counter or G-M counter) is an electronic instrument used for detecting and measuring ionizing radiation. It is widely used in applications such as radiation dosimetry, radiological protection, experimental physics and the nuclear ...

3. Geiger–Müller tube - Wikipedia

   en.wikipedia.org/wiki/Geiger–Müller_tube

   A complete Geiger counter, with the Geiger–Müller tube mounted in a cylindrical enclosure connected by a cable to the instrument. The Geiger–Müller tube or G–M tube is the sensing element of the Geiger counter instrument used for the detection of ionizing radiation. It is named after Hans Geiger, who invented the principle in 1908, [1 ...

4. Vertical jump - Wikipedia

   en.wikipedia.org/wiki/Vertical_jump

   The device used is known as a vertical jump tester. A vertical jump or vertical leap is the act of jumping upwards into the air. It can be an exercise for building both endurance and strength, and is also a standard test for measuring athletic performance. [1] It may also be referred to as a Sargent jump, named for Dudley Allen Sargent.

5. Weighing scale - Wikipedia

   en.wikipedia.org/wiki/Weighing_scale

   A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight scales, mass balances, massometers, and weight balances. The traditional scale consists of two plates or bowls suspended at equal distances from a fulcrum. One plate holds an object of unknown mass (or weight), while objects of known mass ...

6. Metrication in the United States - Wikipedia

   en.wikipedia.org/wiki/Metrication_in_the_United...

   For ounces, the measurements are typically in multiples of 8, for example 32 fl oz and 40 fl oz, which correspond closely to common metric variants including 1 liter and 1.2 liters. Rainfall is usually measured based on the height from the ground in inches. [112]

7. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Time. Watch, a time measurement device. In the past, a common time measuring instrument was the sundial. Today, the usual measuring instruments for time are clocks and watches. For highly accurate measurement of time an atomic clock is used. Stopwatches are also used to measure time in some sports.