BRAVO! Explain Why Machines Are Not 100 Percent Efficient
A machine cannot be 100 percent efficient because output of a machine is always less than input. Any mechanical action will waste energy as heat therefore the work output is always less than the enegry input.
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A machine cannot be 100 efficient because the Second Law of thermodynamics forbids it.
Explain why machines are not 100 percent efficient. - Warren Dec 5. T view the full answer. 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.
So work output is always less than work input. This requires the input to be greater than. Compound machines have low mechanical efficiencies because they have more moving parts and thus more friction to overcome.
Systems always tend toward a state of decreasing order unless more energy is provided into the system to counteract. For the huge work that we need in our world cannot mach to simple machines. The fact that a heat engine cannot be 100 efficient is a consequence of the Kelvin-Plank statement of the second law which can be summarized as Kelvin-Plank.
Generally energy conversion efficiency is a dimensionless number between 0 and 10 or 0 to 100. Machines are not 100 efficient because some of the work done by a machine is used to overcome friction. Efficiencies may not exceed 100 eg for a perpetual motion machine.
This tendency of systems to lose energy is called entropy. Heres an example of efficiency. Increasing efficiency - Higher.
Presence of unspecific products of all kinds could build up florescence making it looks like 100 efficiency which is theoretically impossible. Machines are not 100 efficient because energy is used to overcome friction and this appears as heat energy. All we do is that complex that simple machines to work faster and in a improved version.
I dont see why a cold reservoir is necessary not. Any process that a machine can perform is going to generate heat or sound or deformation or something that isnt useful work. For a heat engine to be 100 efficient youd need an infinitely hot heat reservoir or a cold reservoir at absolute zero -- neither of which is physically realizable.
Why are machines not 100 efficient. It is not possible to have an efficiency of greater than 1 or an efficiency percentage greater than 100. So work output is.
It is so obvious that our huge factory machines are made of simple machines in parts. Why Cant a Machine Be 100 Percent Efficient. Thats because all machines must use some of the work put into them to overcome friction.
The Second Law of thermodynamics states that a. To get a better idea of how machine efficiency is determined lets look at a working. Energy in equals energy out so the input energy of the machine must equal the sum of all these energy losses plus the energy required to do its work.
100 2 ratings effieciency output work input work A simple machine will have an efficiency of 100 if the output work of the machine is equal to the work input. Explain why machines are not 100 efficient. Entropy in a closed system never goes down.
A certain amount of work done on a machine is lost to overcome friction. Why are machines never 100 percent efficient. Because theres no way to completely avoid energy loss.
They just change how the work is done. Goes to raising the temperature of the surroundings.
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