12 glass lid

Ordinary glass is a mixture of sodium and calcium silicates and is made by heating a mixture of sand (essentially SiO 2 ) with sodium carbonate and calcium oxide in a furnace at around 1700K and cooling rapidly. ..

The pictograph shows the number of glasses of chocolate milk shake prepared by Matt's mother on his birthday. How many glasses of milk shake did she prepare in all? => 24 or 4 or 6 or 12..

12. - Calculate the dispersive power for crown and flint glass from the following data: C D F Crown 1.5145 1.5170 1.5230 Flint 1.6444 1.6520 1.66..

Question: The lid of the solar cooker is made up of ______. 1. plastic sheet 2. black sheet 3. plane mirror 4. glass Answer: ..

A solar cooker contains a wooden box having thermocol lining from inside. A box made aluminium is placed inside the wooden box. The inner side of the aluminium box is painted black. The top is closed by a glass sheet. A plane mirror is fixed to the hinged lid. The box is closed ..

1. Prepare1:1 solution of diphenylamine by addition 0.1 g of it in 10 ml of sulphuric acid. 2. Put 1-2 drops of the reagent over a glass slide. Place a section of chlorophyll-free leaf in the reagent and observe under the microscop..

Air - Essential for Burning - We know that without air, we cannot burn anything. In the laboratory, if the flame of a spirit lamp is to be put out, we just place the lid of the spirit lamp on it (Fig.5.1..

a m g represents refractive index of glass with respect to air then Similarly if refraction occurs from denser to rarer medium or The above expression is an important result of the principle of reversibility of light which states that when a ray of light after suffering a large number of ..

Diffusion in Liquids - If a bottle of perfume is opened in one corner of a room, it spreads in the whole room by diffusion. If you drop a little ink in a beaker of water it will spread by itself in the beaker of water and the color spreads uniformly. Diffusion is the natural process of interminglin..

Periodic table is an arrangement of elements in the increasing order of atomic number such that elements with similar properties fall under same vertical column. A Group is a vertical column in the periodic table. A Period is a horizontal row of elements in the periodic table. Long form ..