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pratap nagar,
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25th april 09
SERIES -SCIENCE IN OUR DAILY LIFE
This is the first Article of the new series.i will try to increase your interest in science..
1] force
though you might think that force is a very easy concept and what to learn about it.but science is not as easy as we think.the essential thing is that your concepts are clear..
by defination force means any type of energy that is being exerted purposely or naturally on any body. the applied force cant change the mass or the acceleration of body or sometimes both of them.force is a vector quantity.it means to describe force on any object we require the direction and magnitude.. but it was a bookish language which everybody knows as he must have heared or learnt.
force means--
when u push an object,u apply force. force remains not only with pulling and pushing of the objects,but also with some involuntary activities.in our body, force regulates everything.take the example of respiration. when we respire, during breathing in of the air.. we pull the air in so we have to apply force,and during exhalation we give out air thus again force is there. also it is concerned with energy, the day when we are not wellmwe cant eat properly as we feel weakness we cant chew properly... means we cant apply force.. in case of nature, force is everywhere. like that of running water or blowing wind. even the sun's rays fall on the earth as a result of the force generated when the sun radiates light.. the motion of planets and orbits are governed by force only..
to explain it more clearly we can take an example of 8-9 blocks of wood kept in standing position near each other,when we push the first block,all the further blocks push their ahead blocks and fell down.the reason why they fell down is there is a continuous transmission of force from blocks in the form of energy.the first block receives the force and its magnitude is so high that it can't absorve the energy alone.it has to transmit it to the further blocks.. this is what force dones
THESE ARE ALL EXAMPLES WITH TELL ABOUT FORCE,THEY HAVE NO CONCERN WITH THE DEFINATION.
ARTICLE 2] IF THERE IS NO FORCE IN THE WORLD......
THIS IS A POSSIBLE EVENT. IT MIGHT TAKE PLACE WHEN THE MOTION OF UNIVERSE AROUND ITSELF CEASES. THIS CAN HAPPEN AT THE END OF UNIVERSE IF IT WILL BE A BIG CHILLThe 'heat-death' of the universe is when the universe has reached a state of maximum entropy. This happens when all available energy (such as from a hot source) has moved to places of less energy (such as a colder source). Once this has happened, no more work can be extracted from the universe. Since heat ceases to flow, no more work can be acquired from heat transfer. This same kind of equilibrium state will also happen with all other forms of energy (mechanical, electrical, etc.). Since no more work can be extracted from the universe at that point, it is effectively dead, especially for the purposes of humankind.
This concept is quite different from what is commonly referred to as 'cold death.' 'Cold death' is when the universe continues to expand forever. Because of this expansion, the universe continues to cool down. Eventually, the universe will be too cold to support any life, it will end in a whimper. The opposite of 'cold death,' as you can see, is NOT 'heat death,' but actually the 'big crunch.' The 'big crunch' occurs when the universe has enough matter density to contract back on itself, eventually shrinking to a point. This shrinking will cause the temperature to rise.
although till date there is no place in universe where there is no force!!!!
Akshay Deoras
