Part III Applied Science

Primary and secondary cells their properties and drawback Primary Cell Primary cells are those that cannot be recharged and needs to be discarded after the expiration of their lifetime. If the electrolyte is not in liquid form, we are talking about dry cells. Primary cells usually have high energy density, capacity, are slowly to discharge, … Read more

Reflex action In the body of an animal two types of activities take place: voluntary and involuntary. Voluntary action happens according to the will of the individual while there is not any control of will over involuntary action. Involuntary action may again be divided into two categories. The action of first category is related to … Read more

Nuclear reactors A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a self-sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in propulsion of ships. Heat from nuclear fission is passed to a working fluid (water or gas), which in … Read more

Excretion:In plants Excretion, the process by which animals and plants rid themselves of waste products and of the nitrogenous by-products of metabolism. Through excretion organisms control osmotic pressure—the balance between inorganic ions and water—and maintain acid-base balance. The process thus promotes homeostasis, the constancy of the organism’s internal environment. Plants have no special organs for … Read more

Magnetic storm A magnetic storm is a period of rapid magnetic field variation. It can last from hours to days.  Magnetic storms have two basic causes: The Sun sometimes emits a strong surge of solar wind called a coronal mass ejection. This gust of solar wind disturbs the outer part of the Earth’s magnetic field, … Read more

General studies of alternating current and direct current Alternating Current Alternating Current (AC) Alternating current describes the flow of charge that changes direction periodically. As a result, the voltage level also reverses along with the current. AC is used to deliver power to houses, office buildings, etc. AC can be produced using a device called … Read more

Magnetic keepers A magnet keeper, also known historically as an armature, is a ferromagnetic bar made from soft iron or steel, which is placed across the poles of a permanent magnet to help preserve the strength of the magnet by completing the magnetic circuit; it is important for magnets that have a low magnetic coercivity, … Read more

Production of plaster of paris Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. “plaster” usually means a material used for the interiors of buildings, while “render” commonly refers to external applications. Another imprecise term used for the material is stucco, … Read more