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2. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Action describes energy summed up over the time a process lasts (time integral over energy). Its dimension is the same as that of an angular momentum.. A phototube provides a voltage measurement which permits the calculation of the quantized action (Planck constant) of light.

3. Scientific instrument - Wikipedia

   en.wikipedia.org/wiki/Scientific_instrument

   Historically, the definition of a scientific instrument has varied, based on usage, laws, and historical time period. [1] [2] [3] Before the mid-nineteenth century such tools were referred to as "natural philosophical" or "philosophical" apparatus and instruments, and older tools from antiquity to the Middle Ages (such as the astrolabe and pendulum clock) defy a more modern definition of "a ...

4. Watch Your Kids Experiment and Learn With These Editor ... - AOL

   www.aol.com/lifestyle/best-science-kits-kids...

   Geology Bundle Science Kits. You can’t go wrong with this set of three geology science kits. There’s a crystal-growing lab that includes a light-up base for kids to display their colorful ...

5. Category:Scientific equipment - Wikipedia

   en.wikipedia.org/wiki/Category:Scientific_equipment

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

6. Category:Scientific instruments - Wikipedia

   en.wikipedia.org/wiki/Category:Scientific...

   العربية; অসমীয়া; বাংলা; Башҡортса; Беларуская (тарашкевіца) भोजपुरी; Чӑвашла

7. Science Buddies - Wikipedia

   en.wikipedia.org/wiki/Science_Buddies

   Science Buddies is a website, [2] recommended by educational organizations such as the ALA [3] and the SciLinks program of the National Science Teachers Association (NSTA). [4] All resources and tools on the Science Buddies website are available free to students and teachers.