Metals have a crystal structure. But they're not one big crystal, they're lots of small crystals called grains. The size of the grains affects the physical properties of the metal, like hardness, toughness,... continue reading
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Metals have a crystal structure. But they're not one big crystal, they're lots of small crystals called grains. The size of the grains affects the physical properties of the metal, like hardness, toughness,... continue reading
posted by newtboyI built a water powered hammer called a “Monjolo”. I started by making a water spout from half a hollow log to direct water from the creek. This was set up in the creek and water flowed through it.... continue reading
posted by Joe MotionCooking and leaching Black bean to remove the poison making it safe to eat. A basket was made to leach the poison out in a stream. Also shown are Atherton Oak nuts. The Aboriginal artifacts found near... continue reading
posted by MordhausShaking grains and interesting physics.
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