/oss/taxonomy/term/5048/all en /oss/article/technology-general-science/let-it-fake-snow <p>Have you ever wondered how ski hill operators make snow? Actually, they don't make snow, they make tiny beads of ice, each one about one ten-thousandth of an inch in diameter. It all starts with spraying water from a hose together with compressed air. The air is needed because as it quickly expands, its temperature drops. This is known as the Joule-Thomson effect named after James Prescott Joule and William Thomson, who is better known as Lord Kelvin, having been knighted by Queen Victoria.</p> Fri, 01 Jan 2021 17:00:00 +0000 Joe Schwarcz PhD 8531 at /oss