Month: October 2016

Does Music Sound Any Different At High Altitudes?

Although atmospheric pressure and density influence the speed of sound, the two effects essentially cancel each other out. In fact, the most noticeable factor affecting the speed of sound at high altitude is temperature. At colder temperatures, the molecules in the air carry less kinetic energy, making sound waves travel more slowly. At -1 degrees …

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What Causes More Shampoo Bubbles In Your Hair Than On The Body?

Shampoo makes bubbles because it contains chemicals called surfactants. These are molecules that are part hydrophobic (water-hating), and part hydrophilic (water-loving). They help to pull oils from your hair because the water-loving ends all try to point towards the water, while the water-hating ends want to point towards the oils. This suspends tiny drops of …

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How Is The Greenhouse Gases Emitted Amount Measured?

Satellites measure greenhouse gases in the atmosphere, while on Earth scientists collect air samples from all over the world. Water vapour and clouds make up the majority of greenhouse gases, with carbon dioxide and other gases comprising about 25 per cent. Current samples are then compared with previous ones, including those from air bubbles that …

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