Define instruction: precept; a direction calling for compliance : order âusually used in plural â instruction in a sentence precept; a direction calling for compliance : order âusually used in plural; an outline or manual of technical procedure : directionsâ¦
Defrost Systems in Household Refrigerators. The process of removing the ice or frost from the evaporator or freezer is called as defrosting. The automatic controls employed in the present day refrigerators to prevent the formation of frost on the evaporators are called as the defrost systems. slide 2 of 5.
Petrification (petros means stone) occurs when the organic matter is completely replaced by minerals and the fossil is turned to stone. This generally occurs by filling the pores of the tissue, and inter and intra cellular spaces with minerals, then dissolving the organic matter and replacing it with minerals. This method reproduces the original tissue in every detail. This kind of fossilization occurs in both hard and soft tissues. An example of this kind of fossilization is petrified wood. The process of permineralization. The ground water generally do not contain pure water molecules alone. It is hard to some