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YouTube / JoergSprave

How to Shoot Snowballs With a Slingshot

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YouTube / JoergSprave

Are you snowed in? Why not turn to YouTube for practical advice on flinging snowballs using a slingshot?! It requires the right slingshot, and it's cold work, but it can be done.

In this video, Joerg Sprave demonstrates his snowball slingshot technique. It boils down to a BB-style slingshot equipped with a larger pouch, and a little flick of the wrist.

Sample line: "Large forks -- all they do is, they weaken the slingshot, because they put enormous strain on the wrist. ... What you need is a fairly large pouch."

Use your newfound powers for good, people.

If you enjoy slingshottery or Sprave's "heh-heh-heh" laugh, he has over 300 more slingshot videos. Some of them have to do with zombie protection.

(Via Devour.)

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Watch How to Make a Compass
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Let's say the mega-earthquake comes and you're stranded with just some MacGyver-style bits and bobs. If you've got a magnet and a little knowledge, you can make a compass that reliably points north. Below, check out a vintage segment from Curiosity Show explaining how to do it—and a bit on the science of why compasses work.

In the clip below, presenter Deane Hutton shows three methods involving a mirror, cork, a pin, a drinking straw, and a circular magnet (in different combinations). There's something for everyone!

Incidentally, one of the key issues in making a compass is knowing which end of a magnet points north and which points south. One YouTuber asked how to determine this, if it's not already marked—as might be the case in a survival situation. Decades after the clip aired, Hutton chimed in via YouTube comments to answer:

Wait till the Sun is about to set. Stand with your right shoulder toward the setting Sun. You are now facing South. Suspend the magnet and let it swing freely. When the magnet stops swinging, the end pointing South is the South Pole of the magnet. Deane.

Science is cool. Anyway, enjoy:

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Watch How To Make a Self-Starting Siphon Using Bendy Straws
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In this vintage video segment from Curiosity Show, we learn about self-starting siphons. These things start a flow of water without the user having to squeeze a pump or suck on a tube, which is a distinct benefit.

In the segment, we also observe the limitations of self-starting siphons. Because the act of submersion starts the flow, we're limited to siphoning water out of very full vessels. But still, this could be useful for a home aquarium, which is one of a thousand scenarios in which you don't want to use a mouth-primed siphon.

The best part of the segment is when presenter Rob Morrison shows how to make your own self-starting siphon. File this under "Handy stuff you can do with bendy straws." Tune in and enjoy this simple physics demo:

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