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3 giorni fa · For example, consider the world's primary mass standard for the kilogram, made of platinum and iridium. If its temperature is allowed to change by 1 °C, its mass changes by 1.5 picograms (1 pg = 1 × 10 −12 g ).
3 giorni fa · This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non- synthetic element by both mass and volume is rhodium.
3 giorni fa · The moment of inertia plays the role in rotational kinetics that mass (inertia) plays in linear kinetics—both characterize the resistance of a body to changes in its motion. The moment of inertia depends on how mass is distributed around an axis of rotation, and will vary depending on the chosen axis.
3 giorni fa · A diagram that shows a hierarchical classification of supercapacitors and capacitors of related types. A supercapacitor ( SC ), also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than solid-state capacitors but with lower voltage limits.
1 giorno fa · Energy released by explosion of 1 kilogram of TNT: 8.4×10 6 J: Recommended food energy intake per day for a moderately active woman (2000 food calories) 9.1×10 6 J Kinetic energy of a regulation baseball thrown at Earth's escape velocity (First cosmic velocity ≈ 11.186 km/s = 25,020 mph = 40,270 km/h). 10 7 1×10 7 J
18 ore fa · The high retail value of saffron is maintained on world markets because of labour-intensive harvesting methods, which require some 440,000 hand-picked saffron stigmas per kilogram (200,000 stigmas/lb) – equivalently, 150,000 crocus flowers per kilogram (70,000 flowers/lb).
