with a mucronate apex. The upper surface is greyish -green, smooth and shiny, the lower surface paler ... 1960, with the empirical formula C. 25. H. 32. O. 13 ... Furfural is an organic compound with the formula C 4 H 3 OCHO. It is a colorless liquid, although commercial samples are often brown. It has an aldehyde group attached to the 2-position of furan. It is a product of the dehydration of sugars, as occur in a variety of agricultural byproducts, including corncobs, oat, wheat bran, and sawdust.
The effect of changing the drop height on the bounce efficiency is found by measuring the resulting bounce height using a meter ruler and sighting the rebound as close to right angles to the ruler as possible to minimise parallax errors. Bounce efficiency is then calculated by the following formula: