web analytics

Definition

Define order and molecularity.

by

Order: Order of a reaction is defined by the number of atoms or molecules, whose concentration change during the reaction and determine the rate of the reaction. For example, It is a first order reaction. It is a second order reaction. Molecularity: The molecularity of an elementary reaction is defined as the number of reactant … Read more

What is E-commerce? 7 Features of E-commerce in Detail

by
What is E-commerce? 7 Features of E-commerce in Detail

E-commerce

E-commerce or Electronic Commerce is a modern way of business. Transaction in case of buying or selling a product or service through electronic devices and internet connection is E-commerce. In E-commerce, the buyer and seller can not only communicate with each other but also the buyer can pay and the seller can receive payments through internet connection which can be called electronic payment service. So in E-commerce, a product travels to buyer from seller or a service is served to it’s buyer without the need for the buyer to meet the seller by appearing physically. Again, in E-commerce, the seller receives payment for his/her sale without meeting the buyer physically.

Read more

What is information processing cycle? 4 phases of information processing cycle?

by

Information Processing Cycle: The task of computer, in low level, is to process given data to produce information. Computer takes data, then processes the data as per being instructed and then can either output the generated information to user or store the information to storage or can do both. The generated information can be treated … Read more

What is flux?

by

Flux If  is a vector field, then the flux through any face is defined as the scalar product of the vector area of the face and the vector . That is, Flux = (component of velocity normal to the face) × (area of the face)          The amount of flux per unit area is … Read more

What is electric charge?

by

Electric Charge The reason present in a material causes static electricity, electric field in the material and the material become able to attract other materials is called electric charge. It may be positive or negative. Unit of electric charge is coulomb (C).

What are dextrorotatory and laevorotatory substances?

by

Dextrorotatory and laevorotatory substances are optically active substances. Dextrorotatory  substances Substances which rotate the plane of polarization of the light towards the right are known as dextrorotatory substances. Laevorotatory substances Substances which rotate the plane of polarization of the light towards the left are known as laevorotatory substances.

What is optical activity?

by

Optical activity Optical activity is the ability of a substance to rotate the plane of polarization of plane polarized light. Substances which have this ability are called optically active substance. Tartaric acid is an example of optically active liquid. Explanation When a polarizer and analyzer are crossed, no light emerges out of the analyzer. When … Read more

What is nicol prism?

by

Nicol prism Nicol prism was invented by William Nicol in 1828. It is an optical device used for producing and analyzing plane polarized light. The nicol prism is made in such a way that it eliminates one of the two rays by total internal reflection. It is generally found that it eliminates the ordinary ray … Read more

Define phase velocity and group velocity?

by

Phase velocity Phase velocity is the velocity with which a plane progressive wave front travels forward. Phase velocity is symbolized by . It has a constant phase =  Group velocity The group velocity () is the speed with which the point of reinforcement of the resultant wave travels. The group velocity is different from the individual … Read more

Define Delivery? Explain various delivery concepts or methods.

by

Delivery:  Delivery refers to the way a packet is handled by the underlying network under the control of the network layer. Various delivery concepts are explained below. Connection Types:  Delivery of a packet in the network layer is accomplished by either a connection oriented service or a connection-less service. Connection Oriented Service:  At first a … Read more