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Do you Still Need A TV Aerial?

At the moment you need TV Aerials for Freeview and BT Vision but there is the Freesat alternative that is by a satellite dish. But I beli...

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Thursday, 14 February 2019

Launch an 80,000-Pound Sled off an Aircraft Carrier? Sure!

This electromagnetic catapult flings airplanes into the sky (and giant sleds into the water). Here's how to calculate the projectile motion involved.

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