sea glass

i) Quartz glass is used for manufacturing optical instruments. Under the trade name Vitreosil. ii) Colored quartz is used for manufacturing gems. iii) Sand is used in manufacture of glass, porcelain, sand paper and mortar etc. iv) Sand stone is used as a building material. v) Ki..

1. Appearance Clear and transparent, especially in dilute form. 2. Sub-division of particles The solute breaks up into tiny particles, which could even be of ionic or molecular size. Solute particles become too small as compared to the pores of a filter paper and they pass through filter paper alon..

The round-bottomed flask is filled completely with water. It is closed with a one holed rubber stopper through which a delivery tube is passed. A burette filled with water is inverted and placed in a beaker of water. The free end of the delivery tube is placed in the glass beaker under th..

The flash of lightning due to collision of clouds is seen much before the thunder, although both occur simultaneously. This happens because the velocity of light is greater than the velocity of sound. The speed of sound depends on the properties of the medium through which it travels. The medium..

The SI unit of density is kg m - 3 and in the cgs system, the unit of density is g cm -3 . The densities of different substances vary widely. Densities of most of the solids are greater than that of liquids, though there are exceptions. Densities of wood, wax and cork are less than that of water an..