Detail Hysterectomy; Fuel-saving Tyres   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 406 no. 8817 (Jan. 2013), page 61. Topik: Silica; Tyres; Green Technology Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.75 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Silica extracted from rice husks makes for greener tyres Tyres are remarkable pieces of engineering. At high speed in slippery bends they provide only a few square centimetres of contact with the road, yet they help a driver steer safely around the corner. Once, they were made entirely of natural rubber. These days they also contain rubber-like polymers, layers of steel braiding and textile reinforcements, all of which improve performance and cut fuel consumption. Now Pirelli, an Italian tyremaker, is manufacturing fuel-saving tyres that are greener still by extracting one of their ingredients from rice husks. One good way to save fuel is to reduce rolling resistance, which is caused, in part, by a vehicle's weight repeatedly squashing its tyres. As the tyres bounce they convert kinetic energy into heat, thus wasting it. Hysteresis loss, as this is known, can be reduced by mixing a tyre's rubber with powdered material that has strong chemical bonds in it. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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