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2. Mass spectrometry - Wikipedia

   en.wikipedia.org/wiki/Mass_spectrometry

   Mass spectrometry. Mass spectrometry ( MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures ...

3. Scientific instrument - Wikipedia

   en.wikipedia.org/wiki/Scientific_instrument

   Scientific instruments vary greatly in size, shape, purpose, complication and complexity. They include relatively simple laboratory equipment like scales, rulers, chronometers, thermometers, etc. Other simple tools developed in the late 20th century or early 21st century are the Foldscope (an optical microscope), the SCALE (KAS Periodic Table ...

4. Analytical balance - Wikipedia

   en.wikipedia.org/wiki/Analytical_balance

   An analytical balance (or chemical balance) is a class of balance designed to measure small mass in the sub-milligram range. The measuring pan of an analytical balance (0.1 mg resolution or better) is inside a transparent enclosure with doors so that dust does not collect and so any air currents in the room do not affect the balance's operation.

5. Electrical measurements - Wikipedia

   en.wikipedia.org/wiki/Electrical_measurements

   Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measurement of electrical quantities may be done to measure electrical parameters of a system. Using transducers, physical properties such as temperature, pressure, flow, force, and many others can be converted into electrical signals, which ...

6. Melde's experiment - Wikipedia

   en.wikipedia.org/wiki/Melde's_experiment

   Melde's experiment. A model of Melde's experiment: an electric vibrator connected to a cable drives a pulley that suspends a mass that causes tension in the cable. Melde's experiment is a scientific experiment carried out in 1859 by the German physicist Franz Melde on the standing waves produced in a tense cable originally set oscillating by a ...

7. Kaufmann–Bucherer–Neumann experiments - Wikipedia

   en.wikipedia.org/wiki/Kaufmann–Bucherer...

   The main problem of Kaufmann's experiments was his use of parallel magnetic and electric fields, as pointed out by Adolf Bestelmeyer (1907). Using a method based on perpendicular magnetic and electric fields (introduced by J. J. Thomson and further developed to a velocity filter by Wilhelm Wien), Bestelmeyer obtained considerably different values for the charge-to-mass ratio for cathode rays ...