﻿ The Brick Double-Domino Effect Explained | Safe Videos for Kids
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# The Brick Double-Domino Effect Explained

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## Description

If you use bricks as dominoes: you get a second wave going in the opposite direction.

Watch the original brick domino video here:

I think that is the original upload. If anyone finds a better one, please do let me know.

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https://www.patreon.com/standupmaths

CORRECTIONS
- The overlap length should be 21 - √(21² - 6²) = 0.875 cm not the incorrect √(21² + 6²) - 21 = 0.84 cm I show on-screen. First spotted by Daryl Adriano.
- A correction to my masonry terminology! What I called the width is actually the height of a brick (which makes sense given the orientation bricks are normally laid). The width is the third dimension: how far into the wall they reach. Thanks to Doodle Vids.
- Let me know if you spot anything else!

Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: http://standupmaths.com/
Maths book: http://makeanddo4D.com/
Nerdy maths toys: http://mathsgear.co.uk/