SCIENCE

What Is Plasticizer? Any substance added to a polymer material that can increase the plasticity of a polymer is referred to as a plasticizer. Plasticizers make plastics elastic, extensible, flexible and plastic at low temperatures. Plasticizers are produced by reaction of an alcohol with an acid such as adipic acid, phthalic anhydride and so forth. … Read more

What Is Star Connection? In star connection, one end of all the three wires are connected to a common point in the shape of Y, such that all the three ends of the three wires form the three phases and the common point forms the neutral.  Star connection is preferred for long distance power transmission … Read more

Grafting and budding are horticultural techniques used to join parts from two or more plants so that they appear to grow as a single plant. Grafting and budding are the most widely used vegetative propagation methods. In grafting, the upper part (scion) of the plant grows on the root system (rootstock) of another plant whereas … Read more

What Are Biceps? The biceps branchii commonly referred to as biceps is located in the anterior compartment of the arm. The biceps muscles run from the front of the shoulders to the elbow. It works across three joints and is able to generate movements in glenohumeral (shoulder), elbow and radio-ulnar joints. The biceps are responsible … Read more

Arteries and veins transport blood in two distinct circuits: the systemic circuit and the pulmonary circuit.  Systemic arteries provide blood rich in oxygen to the body’s tissue. The blood returned to the heart through systemic veins has less oxygen since much of the oxygen carried by the arteries has been delivered to the cells. In … Read more

What Is Evaporation?                                       Evaporation is a natural process and it is similar to boiling, but the liquid form changes into gaseous form when there is an increase in either temperature or pressure or both. When the molecules of liquid collide, they transfer energy to each other based on how they collide with each other. When … Read more

What Is Action Potential (AP)? An action potential (AP) occurs when the membrane potential of a specific cell location rapidly rises and falls. This depolarization then causes adjacent locations to similarly depolarize. Action potentials occur in several types of animal cells referred to as excitable cells, which include neurons, muscle cells, endocrine cells, glomus cells … Read more

Daniell Cell The Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist and consists of a copper pot filled with a copper (II) sulphate solution, in which is immersed in unglazed earthware container filled with sulphuric acid and a zinc electrode. The Daniell cell … Read more

What A Machine? A machine is a mechanical structure that uses power to apply forces and control movement to perform an intended action. Machine can be simple like a lever or pulley or they can be more complex like computers and sensors that monitor performance and plan movement, often referred to as mechanical system. Machines … Read more

What Is A Series Circuit? A series circuit is a circuit in which resistors are arranged in a chain, so that current has only one path to take. The current is the same through each resistor but voltage is dropped (lost) across each of the resistances.  In a series circuit, the sum of the voltages … Read more