Why Machines Are Never 100 Efficient
Entropy in a closed system never goes down. This tendency of systems to lose energy is called entropy.
The Sewing Gadgets Make Sewing Quicker More Efficient And More Accurate Great Gift Ideas For Someone Who Love Sewing Machines Best Gadget Gifts Sewing Basics
I dont see why a cold reservoir is necessary not talking about the stirling engine just a thermodynamic process in general.
Why machines are never 100 efficient. A machine cannot be 100 percent efficient because output of a machine is always less than input. A machine is defined as an apparatus using mechanical power and having several parts each with a certain function jointly performing a particular task. So work output is always less than work input.
A A nuclear power plant converts energy from nuclear fission into electricity with an efficiency o. In a rudimentary form The energy of a closed system is a conserved quantity. The efficiency of a machine is the ratio of the useful work performed to the total energy expended.
Get an answer to your question Why is the efficiency of a machine never 100. You never get 100 efficient because you ALWAYS get some heat and sound being produced by machines. Law of Conservation of energy.
That is why 100 efficiency in machines shall not be possible. No machine can be 100 efficient. Write the expression for electric power and solve for the energy.
Apart of input is always used in moving the parts of machine. Friction is the force that prevents all machines from being 100 percent efficient. There is always loss of energy usually due to friction.
A part of input is wasted in overcoming friction between various parts of machine. By contrast in physics problems an ideal machine is a hypothetical device which is. AnsweredFeb 21 2019by Akul722kpoints selectedFeb 21 2019by Vikash Kumar.
THere is no way to make the heat outpu be zero so therefore less work will come out of the machine than goes in. Ultimately we are limited by quantum uncertainty. A 100 efficient thermodynamic process would be non cyclable because the volume would have to be expanded infinitely so 100 is an asymptote Stirling engine needs a cold reservoir to operate.
The efficiency of an actual machine is never 100 because of the Second law of thermodynamics which states that the quality of energy will decay eventually becoming heat. A machine cannot be 100 efficient because the Second Law of thermodynamics forbids it. A machine is defined as an apparatus using mechanical power and having several parts each with a certain function jointly performing a particular task.
Reducing friction will enhance. 100 efficiency would require that we perfectly control where every last bit of energy goes and what it does. It produces a resisting force that hinders the machines complete functioning.
See full answer below. Therefore not all energy is used. The Second Law of thermodynamics states that a transformation.
Systems always tend toward a state of decreasing order unless more energy is provided into the system to counteract this tendency. Energy in some form must be expended if the machine is 100 percent efficient the work done in Joules will equal the energy input in Joules but of course machines are never 100 percent efficient. And sound and heat use the energy put into the machine to happen.
A certain amount of work done on a machine is lost to overcome friction and to lift some moving parts of the machine. In the real world machines are never 100 efficient. A machine cannot reach 100 percent efficiency because all machines require some energy to offset adverse effects on its process.
In actual machine there is always some loss of energy due to friction and weight of moving parts thus the output energy is always less than the input energy. The efficiency of a machine is the ratio of the useful work performed to the total energy expended. On the atomic scale there is a simple amount of quantum uncertainty built in so that we can never perfectly control or even know where every atom is and where it is moving.
The thermal energy that is produced heat plus the useful work that comes out of the machine together must equal the work put into the machine. No machine can be 100 efficient. Done by machines is calculates as Mechanical Efficiency which is Work Output divided by Work Input.
Energy does not come in or go out byto external sources. Machines are not 100 efficient because some of the work done by a machine is used to overcome friction. Uhh it is a constant quantity.
Science Input Charts The Mom Blogger Simple Machines Science Anchor Charts Science Classroom