What is the volume of sound? Sounds are vibrations that travel through the air. A weak vibration doesn't travel very far. Discover more about volume. All about light Learn how light travels and ...

What is pitch? A drum with a tight skin makes a high pitched wave. Find out more about sound waves and pitch. What is light? Light comes from different sources, like lamps, bulbs and the sun.

Here's a batch of fresh news and announcements from across Imperial.From mining dust to cooling light to startup hub rankings, here's some quick-read ...

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The consistency of white noise creates a tried-and-true masking effect ... fan, light rainfall and thunderstorm. You can even mix tracks to create the perfect sleep sound cocktail for you.

BEING desirous of obtaining a more suitable highresist ance for use at the Shore Station in connection with my system of testing and signalling during the submersion of long submarine cables, I ...