## Thursday, September 23, 2010

### bivariate correlation

Let us learn about bivariate correlation

A correlation is referred as a measure of the extent when the change in 1 variable are associated or followed by the change in the other variable. 2 variables which are connected in such a way are known as bivariate population. Best example, the yield of a crop varies with the amount of rainfall and so on.

A correlation, or bivariate correlation, measures the relationship between 2 variables. The correlation measures the strength of the relationship.

A bivariate correlation is a statistical test which measures the association or relationship between 2 continuous/interval/ordinal level variables. This test will use probability & tell the researcher the nature of the relationship between the 2 variables, but not the direction of the relationship in the sense of describing causality

Correlation coefficients range from -1 to +1. If the bivariate correlation coefficient is -1, the relationship between the 2 variables is perfectly negative, & if the bivariate correlation coefficient is +1, the relationship between the 2 variables is perfectly positive. The closer the correlation coefficient is nearer to -1 or +1, the stronger the relationship. The closer the correlation coefficient is to zero, the weaker the relationship.

## Wednesday, September 22, 2010

### reproduction of bacteria

Let us learn about reproduction of bacteria

Bacteria can reproduce at marvelous speeds. Some bacteria can reproduce as often as once every twenty minutes! However, bacteria have certain conditions in which to reproduce. These circumstances are not often met, & that is 1 thing that keeps bacteria from growing out of control.

Bacteria reproduce using 2 basic methods: asexual & sexual reproduction.

Asexual reproduction includes only 1 individual or parent. The offspring produced by asexual reproduction are exact duplicates of the parent. Binary fission is the method by which a bacteria splits into 2 cells. Each cell gets an exact copy of the parent cell's genetic material.

Sexual reproduction involves the joining of 2 parent cells & the exchanging of genetic materials. In sexual reproduction, the offspring will contain a mixture of the parent cells' traits. Conjugation is the method by which bacteria join & exchange genetic materials. Once genetic materials are exchanged, every single bacteria cell will go through binary fission to produce an offspring with a new genetic makeup.

In our next blog we shall learn about examples of producers I hope the above explanation was useful.Keep reading and leave your comments.

## Monday, September 20, 2010

### hydrocarbon suffix

Let us learn about hydrocarbon suffix

For hydrocarbons with 1 or more single bonds between carbon atoms, the molecules are known as alkanes, & the suffix is "-ane".
With 1 or more double bonds, these molecules are known as alkenes the suffix is "-ene".
With 1 or more triple bonds, the molecules are known as alkynes, and the suffix is "-yne".

Hydrocarbons are a class of molecules which contain only carbon & hydrogen atoms. Some of them make very good fuels. Gasoline contains a mixture of hydrocarbons. Unsaturated hydrocarbons, that contain 1 or more double bonds, are useful chemicals for many reactions.

The simplest hydrocarbons are linear molecules in that each carbon atoms is bonded to 2 other carbons atoms, in a linear fashion, except for the carbon atoms at the ends, which are only bonded to 1 other carbon atom. Saturated hydrocarbon names basically end with the suffix "ane" which distinguishes them from unsaturated hydrocarbons, which end with the suffix "ene".

Linear saturated hydrocarbons are called as paraffins or alkanes. Their general formula is CnHn+2.

## Sunday, September 19, 2010

### ammonium phosphate formula

Let us learn about ammonium phosphate formula

Formula of Ammonium phosphate - (NH4)3PO4

Molecular Weight of Ammonium phosphate - 149.086741 [g/mol]

Molecular Formula of Ammonium phosphate - H12N3O4P

Exact Mass of Ammonium phosphate - 149.056542

MonoIsotopic Mass of Ammonium phosphate - 149.056542

Topological Polar Surface Area of Ammonium phosphate - 89.2

H-Bond Donor of Ammonium phosphate: 3

H-Bond Acceptor of Ammonium phosphate: 4

IUPAC Name of Ammonium phosphate: triazanium phosphate

Ammonium phosphate is referred as the salt of ammonia & phosphoric acid. Ammonium phosphate has the formula (NH4)3PO4 & it consists of ammonium cations & phosphate anion. Ammonium phosphate is obtained as a crystalline powder upon mixing concentrated solutions of ammonia & phosphoric acid, or on the addition of excess of ammonia to the acid phosphate (NH4)2(HPO4). Ammonium phosphate is soluble in water, & the aqueous solution on boiling loses ammonia & the acid phosphate (NH4) (H2PO4) is formed.

Ammonium phosphate is mostly used as an ingredient in fertilizers as a high source of elemental nitrogen. Ammonium phosphate is also used as a flame retardant in thermoplastic compositions

In our next blog we shall learn about stages of evolution I hope the above explanation was useful.Keep reading and leave your comments.

## Thursday, September 16, 2010

Adsorption is referred as the process of attraction of atoms or molecules from an adjacent gas or liquid to an exposed solid surface. Such attraction forces support the molecules into layers onto the existent surface.

Absorption generally refers to 2 phenomena which are largely unrelated. In 1 case, it refers to when molecules, atoms, or ions enter some bulk phase - gas, liquid or solid material. For instance, a sponge absorbs water when ever it is dry.

Absorption defined as the process by which the energy of a photon is taken up by another entity, best example, by an atom whose valence electrons make transition between 2 electronic energy levels. The photon is destroyed in the method. The absorbed energy can be re-emitted as radiant energy or transformed into heat energy. The absorption of light during wave propagation is often known as attenuation. The tools of spectroscopy in chemistry are sourced on the absorption of photons by molecules & atoms.

Adsorption is similar, but refers to a surface rather than a volume: adsorption is a process which occur when a gas or liquid solute accumulates on the surface of a solid or, more rarely, a liquid, forming a molecular or atomic film. Adsorption is different from absorption, in that a substance diffuses into a liquid or solid to form a solution.

## Wednesday, September 15, 2010

### non conventional energy sources

Let us learn about non conventional energy sources

Non-conventional energy sources are defined as the energy sources which gives non-renewable energy.

Non conventional energy sources are referred the energies that are not replaced by any new identical 1 in the place of the used ones.

Fossil fuels are the Best example for the non-conventional energy source. You cannot replace the used fuels by new 1 in the same source. Consider the sources to a pencil, if you sharpen it, the size reduces, and you cannot increase the size of used sharpened pencil. Similarly we cannot refill the source, if you take the fuel the amount of fuel decreases, 1 day it will be completely exhausted.

Some other examples for the non-conventional energy sources tar heavy oil, oil shale, sands, and bio-fuels.

In our next blog we shall learn about gas stations near me I hope the above explanation was useful.Keep reading and leave your comments.

### examples of inertia

Let us learn about examples of inertia

Inertia is referred as the resistance of any physical object to a change in its state of motion or rest. Inertia is represented numerically by an object's mass

Best Examples of Inertia of Rest

• A passenger standing in a bus leans backwards as soon as the bus starts all of a sudden
• Fruits & flowers fall down when the branches of a tree are shaken by wind
• particles of Dust on a carpet falls when we beat the carpet with a stick & or with hard object