Pipes can freeze in the winter, but you never hear about fire hydrants freezing. What makes them safe from the cold temperatures in winter time?
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Introduction Hans Christian Oersted (1777–1851), a Danish physicist, was performing an experiment in 1820 when he noticed that whenever an electric current from a battery was switched on or off, a... read more
[caption id="attachment_2218" align="alignleft" width="300"] Image Courtesy of Jennifer Hall[/caption] In September 2014, paleontologists working in Patagonia, Argentina, uncovered what may be the... read more
A candle and beaker of pink phenolphthalein solution are placed inside a jar. The candle is lit and the jar is capped. The flame expectedly goes out as the oxygen is depleted. After the flame... read more
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