Skip to main content

WASTING EFFICIENTLY

 
  

 The national geographic magazine is well known for its breath taking photographs.  To select one good photograph,  it rejects hundreds.

      While sculpting a statue, the sculptor chisel out lot of unwanted portions from the stone and a beautiful figure emerges.

     In making gold jewelery, there will be a wastage.  Every brand claims, there wastage charge is minimum.  In all electrical appliances, electricity produces unwanted heat energy.  Hence we lose electrical energy in the form of heat.

      Hence the wastage is unavoidable.  The prime aim of science and technology is to reduce wastage to a minimum in energy, time, space and resources etc

Energy:

 Take the tungsten bulb invented by Edison.  We say today, it is highly inefficient, even though it illuminated the world nearly for 100 years.  It emits lot of heat besides light.  Hence we have now moved to LED bulbs which is more efficient.

      Petrol engine, diesel engine, steam engine, and jet engine ; all the heat engines does not convert all the fuel into mechanical work.  That is, they have less than 100 % efficiency.  Engineers always strive to increase their efficiency.  

Space:

     If you want to utilize space properly, fold up things like brain tissues; like intestine tubes.  In CD and DVD, several miles long track is folded up into a compact spiral.
   Sphere shape encloses maximum volume for a given surface area.  Hence most natural shapes are spherical{vegetables, fruits, eggs}.

Time:

     To use time efficiently, do things parallely and not serially.  That is do not do things one by one.  But do multitasking.  
[if required]
     The more the work we do, we get more time.  The less the work we do, we get less time.

Resources:

     To waste less, use recyclable; rechargeable; renewable resources.  We no longer use 'one time use' batteries, instead we use rechargeable ones.  Our body recycles blood etc,.  Our eco-system recycles itself.  We are now shifting to renewable energies like wind energy, hydro energy, solar energy etc,.

 Do not go for 'use and throw'.
Go for 'use and reuse'.

Information:

    Store your bio-data, mails, magazines, movies, books, certificates, documents, money, shares,photos in virtual storage.  That is, use electronic memory and avoid physical material so that we can reduce the wastage of trees , papers, ink, storage-space and time.

 Waste less and save earth.

 Post script:  Efficiency = useful output /total input

     In heat engine, efficiency= heat converted into work/total heat supplied

We always try to bring this ratio to '1' or 100 % which is often very difficult.       


       

Comments

Post a Comment

Popular posts from this blog

THE EARTH, A SUPER ORGANISM

     JOIN MY COURSE: "Become a programmer in a day with python"       A man called 'love lock' (what a name) proposed a theory called Gaia theory, named after Greek Goddess.      It says, "Earth is a self-regulating organism like a human being.  The organic life in it interacts with in-organic matter and maintains atmosphere, temperature and environment".  Hence the earth is still suitable for the life to thrive.      Imagine, in a particular place, there are lot of flowers.  Some flowers are white and some are darkly coloured.  We know, white reflects light and heat while dark absorbs the same.  White flowers can thrive in hot climate.  But dark flowers requires cold climate.  The absorption and reflection balances and the environment reaches average, warm temperature at which both the flowers can co-exist.  This is the essence of "Gaia" theory.      On our earth, ...
3 comments
Read more

DISORDER IS THE "ORDER OF THE DAY"

         Imagine a balloon full of air.  The air molecules are moving randomly inside the balloon.  Let us pierce the balloon with a pin.  The air rushes out.  Why should not the air molecules stay inside the balloon safely and ignore the little hole?  That is not the way the world works.  The molecules always "want to occupy as many states as possible".  Hence the air goes out in the open to occupy more volume.   The things always goes into disorder (entropy) and the disorder increases with time.  The above statement is what we call "second law of thermodynamics".      Consider a cup of coffee on the table. Suppose the heat from entire room flows to your cup of coffee, the coffee will boil and the rest of the room will freeze.  Freezing means bringing things to order and arrangement.  It violates the second law.  Hence it will never happen.  Hence heat must flow from high ...
Post a Comment
Read more

CASINO'S GAME

           Let us find out how the casino survives with mathematics.      Say, your friend invite you for a game of dice.  You must bet (wager) 2 dollars.  If you roll 'six' you will get back 8 dollars.  The game will go on for 30 rounds.  All sounds good.      The probability of rolling 'six' is 1/6.  Since the game will be played for 30 times, the 'expected win' is 30*1/6 = 5.  That is, you are expected to win 5 rounds out of 30.  Hence your gain will be 5 * 8 =40 dollars.  ok.  This also implies that you will loose 25 rounds.  Hence your loss will be 25*2 =50 dollars.  Your net gain will be gain-less = 40-50 = -10 dollars. For 30 rounds, the loss is -10 dollars, Hence, for one round =-10/30 = -1/3 dollars.  There will be a loss of -1/3 or 0.33 dollars per round.  It is not a fair game.     Let us make a simple formula to calculate  'Pa...
4 comments
Read more