This shadow was created by Phobos, a satellite of Mars. Photo captured and sent by perseverance Phobos is 150 times smaller than our Moon and 50 times closer to Mars. Because it is so close, Phobos will crash into Mars...
One of the most confusing terms in the air conditioning industry is "ton". For an air conditioner, the word does not refer to weight. Instead, a ton of ice refers to the amount of heat required to melt completely. Shows...
You put some zinc into the hydrochloric acid in a test tube. The formation of hydrogen gas can be seen. That's the chemistry you know. Zn + HCl → ZnCl2 + H2 In 1766, Henry Cavendish identified this element and...
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