There is another type of force in the physics we know that is electro motive force,also called emf (denoted and measured in volt), is the voltage developed by any source of electrical energy such as a battery or dynamo. It is generally defined as the electrical potential for a source in a circuit.
.A device that supplies electrical energy is called a seat of electromotive force or emf. Emfs convert chemical, mechanical, and other forms of energy into electrical energy. The product of such a device is also known as emf.

In electromagnetic induction, emf can be defined around a closed loop as the electromagnetic work  that would be done on a charge if it travels once around that loop. (While the charge travels around the loop, it can simultaneously lose the energy gained via resistance into thermal energy.) For a time-varying magnetic flux linking a loop, the electric potential scalar field is not defined due to circulating electric vector field, but nevertheless an emf does work that can be measured as a virtual electric potential around that loop.

                                                 detailed explanation of gas laws.........

I already mentioned that there is another type of pressure called gaseous pressure which is studied in the special branch in chemistry which has been developed from 18th century onwardscalled gaseous states,. which completely deals on the pressure , temperature, volume,and number of atoms in the gaseous mixtures or one single type of gas,.there are number of laws and theories in this branch like boyles law,charles law ,avagadros law,gaylussac law,grahams law,daltons law,ideal gas equations,. 
boyles law:pressure(p) is inversely proportional to volume(v) at a fixed temparature(T). 
charles law: volume(v) is directly proportional to temperature(T) at a fixed pressure(p).
gaylussacs law: pressure(p) is directly proportional to temperature(T) at constant volume(v).
avagadros law: volume(v) occupied by ideal gas is proportional to number of molecules of the gas in that container(n).
grahams law: rate of diffusion of a gas is inversly proportional to square root of density(d).
daltons law: the pressure of the total gaseous mixture is equal to the sum of pressures of individual components of the gases in the mixture.and this law is also called as the daltons law of partial pressures.
henrys law:At constant temperature, the amount of a given gas dissolved in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.
ideal gas equation: the combinations of all the above gas laws gives the ideal gas equation whic is PV=nRT.
and even some more information can be gathered in further posts.keep going with our favorite bloggers of science.......(supersscience.blogspot.com)........

In this session we are going to deal about the other type of pressure which we generally know which is called as the atmospheric pressure .
in general the earths atmosphere is extended upto 200km from the surface of the earth.the pressure exerted by the atmosphere is perpendicular to any of the bodies on the earth is called pressure due to the atmosphere or atmospheric pressure .
do you know that the pressure on the Venus is more ans more that if a human reaches the surface of the Venus   that human may severely  affects with the pressure that he may die with the explosion of the blood from his body.
even on the surface of earth this pressure varies according to the altitudes and from the heights which we are considering to...

even this is the initiation to the further studies of gaseous states and gas laws.which we will discuss in the further posts.
there are so many instruments which are used to measure this atmospheric pressure like barometer,manometer,mercury barometer,aneroid barometer,fortin barometer,like wise....
applications of the atmospheric pressure are....

 in the way the topic atmospheric pressure continues to the further studies of gases and its pressures as gaseous state.
for more intresting topics keep on going with our blog supersscience.blogspot.com...