If I Were In Charge ... "Mohs scale: A qualitative scale of hardness invented by Friedrich Mohs [1773-1939] in which a substance with a higher number on the scale can scratch all substances with a smaller number.
Talc is given the value 1 on the scale, and diamond 10. " - The New Penguin dictionary of Science M J Clugston ed. Penguin Books 1998 The usefulness of this idea is that it would let people know if the cleaning product or tool they were using would scratch and damage the thing they were working on. The Invisible Bicycle Helmet. Researchers halve machines' fuel consumption, by turning them into hybrids.
Researchers have harnessed the energy generated by heavy machines, and used it to cut their fuel consumption by half (Photo: Aalto University) Image Gallery (4 images) Many hybrid cars feature regenerative braking - they harness the energy generated when they brake, and store it in the battery for later use.
DIY Electronics.