…and (conventionally used in informal contexts to coordinate two closely connected elements)…
…and (conventionally used in informal contexts to coordinate two closely connected elements)…
…the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second, and is equivalent to 100,000 dynes…
…the chemical element of atomic number 7, a colourless, odourless unreactive gas that forms about 78 per cent of the earth’s atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant…
