Sugar soap Sugar soap Sugar soap, as typically found in Commonwealth countries, is a cleaning material of variable composition sold for use on surfaces affected by greasy or tarry deposits which are not easily removed with routine domestic cleaning materials. Its name arises from the fact that, when in dry powder form, it resembles table sugar. The solution is alkaline and its uses include cleaning paintwork in preparation for repainting. The precise ingredients and their proportions (and consequentially what hazards, if any, are associated) vary between manufacturers and suppliers but are now generally found listed in the Material Safety Data Sheets found
Proper acceleration in curved spacetime are book-keeper coordinates but not those of a local observer. The magnitude of the above proper acceleration 4-vector, namely formula_15, is however precisely what we want i.e. the upward frame-invariant proper acceleration needed to counteract the downward geometric acceleration felt by dwellers on the surface of a planet. A special case of the above Christoffel symbol set is the flat-space spherical coordinate set obtained by setting "r" or "M" above to zero: From this we can obtain, for example, the centri"petal" proper acceleration needed to cancel the centri"fugal" geometric acceleration of an object moving at constant angular