water pollution causes

In this blog we are going to discuss about water pollution causes. Also see the given link to know about air pollution causes.

*  Industrial wastes, containing heavy metals, harmful chemicals, by-products, organic toxins & oils, in to the nearby source of water is one of the visible causes of water pollution.
    * Human & animal wastes causes water pollution.
    * Effluents from factories, refineries, injection wells & sewage treatment plants are dumped in to urban water supplies, leading to water pollution.
    * plenty of pollutants, both harmful & poisonous, enter the groundwater systems through rain water.
    * The residue of agricultural practices, including fertilizers & pesticides, are some of the major sources of water pollution.
        * One more major source of water pollution comprises of organic farm wastes. When farmland, treated with pesticides & fertilizers, is irrigated, the excess nitrogen & poisons get mixed in to the water supply, thereby contaminating it.
    * Pathogens, sediments & chemical pollutants are other sources of water pollution.

Next time we will discuss more about this concept.

   

land pollution causes

 In this blog we are going to discuss about land pollution causes.Also see the given link to know about noise pollution causes.

what are the sources of land pollution?

Land pollution is pollution of the natural land surface by industrial, commercial, domestic and agricultural activities.


various the main  land pollution causes are:

    * Chemical and nuclear plants
    * Industrial factories
    * Oil refineries
    * Human sewage
    * Oil and antifreeze leaking from cars
    * Mining
    * Littering
    * Overcrowded landfills
    * Deforestation
    * Construction debris.

Next time we will learn more about this concept.

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types of friction

In this blog we are going to discuss about types of friction.Also see the given link to know about force of friction.

Frictional force is a resistive force, which oppose the relative motion between 2 bodies or 2 surfaces.

Type 1 : Static Friction- it is the force of friction which exactly balances the applied force in the work of the stationary state of the body..It is a self adjusting force i.e. it fine-tune its magnitude and direction so as to become exactly equal and opposite to the applied force.

Coefficient of static friction- For any six surfaces in contact, it is the ratio of the limiting friction F(rms) and the normal reaction R between them,denoted by u(s)

                                                                u(s)= F(rms) / R

 The u(s) is a pure ratio with no units and it value depend on the state of polish of the six surfaces in contact .If the surfaces are smooth, the worth of  u(s) is small.

Next time we will see more about this concept.

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