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2. Sterilite - Wikipedia

   en.wikipedia.org/wiki/Sterilite

   Sterilite was founded in 1939 in Fitchburg, Massachusetts as a partnership between Saul and Edward Stone and Earl Tupper, the inventor of Tupperware. The company gained initial business by selling plastic goods to the Armed Forces during World War II. The company later expanded operations to produce toys, storage tools, giftware, and other ...

3. Sperrylite - Wikipedia

   en.wikipedia.org/wiki/Sperrylite

   Sperrylite is a platinum arsenide mineral with the chemical formula PtAs2 and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure. It forms cubic, octahedral or pyritohedral crystals in addition to massive and reniform habits. It has a Mohs hardness of 6–7 and a very high specific ...

4. International Prototype of the Kilogram - Wikipedia

   en.wikipedia.org/wiki/International_prototype_of...

   The only three verifications occurred in 1889, 1948, and 1989. For instance, the US owns five 90% platinum / 10% iridium (Pt‑10Ir) kilogram standards, two of which, K4 and K20, are from the original batch of 40 replicas distributed in 1884. [Note 4] The K20 prototype was designated as the primary national standard of mass for the US. Both of ...

5. Candela - Wikipedia

   en.wikipedia.org/wiki/Candela

   The 26th General Conference on Weights and Measures (CGPM) redefined the candela in 2018. [10] [11] The new definition, which took effect on 20 May 2019, is: The candela [...] is defined by taking the fixed numerical value of the luminous efficacy of monochromatic radiation of frequency 540 × 10 12 Hz, [a] K cd, to be 683 when expressed in the unit lm W −1, which is equal to cd sr W −1 ...

6. Keep your pantry tidy and organized with these airtight ... - AOL

   www.aol.com/lifestyle/keep-your-pantry-tidy-and...

   Vtopmart Airtight Food Storage Containers, 7-Piece. $24 $40. Save $16 with coupon. Organize your pantry like a pro with these durable, stackable, BPA-free containers. The set includes one tall ...

7. Luminous intensity - Wikipedia

   en.wikipedia.org/wiki/Luminous_intensity

   Luminous intensity. In photometry, luminous intensity is a measure of the wavelength -weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.