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Why are there no machines that use energy with 100 percent efficiency?
From a practical standpoint there are no machines that use energy with 100% efficiency because all movement generates some friction and hence heat and loss of efficiency. Even electrons moving through superconductors generate minute amounts of heat. From a theoretical standpoint it's impossible to get 100% efficiency; all energy transformations increase entropy. Even if you could devise a machine with no friction, the process of converting energy from one form to another ALWAYS increases entropy. It's a result of the second law of thermodynamics. No machine can perform with 100% thermodynamic efficiency. The process used by any machine, be it steam, electric, horse drawn, wind, or whatever, can be reduced to a simple description of heat moving from a higher temperature to a lower temperature. The Carnot cycle provides a means to calculate the maximum theoretical efficiency possible. In reality, this maximum efficiency is NEVER achieved due to heat losses, friction, etc. Note that according to the Carnot cycle, 100% efficiency is impossible. The energy input to the machine can NEVER be entirely converted to useful work. Some of the energy is ALWAYS lost as heat to the surroundings.
What is the efficiency of a generator that produces 80 kilowatts of electric energy and has electric and mechanical losses of 20 kilowatts?
power in equals power output plus power loss so input power for this question is 100 kw now use efficiency formula 100/80 times 100 to get 80% efficient
Which energy is used in a Xerox machine?
All photocopy machines use electrical energy.
What is percent efficiency?
it is the amount of work that can be done. a machine can use 300,000 J of energy but it only uses 263,000 J. that is percent efficiency.
Is it true the energy use for metabolic processes reduces the efficiency of secondary productivity?
TRUE
Why Are There no machines that that use energy with 100 efficiency?
From a practical standpoint there are no machines that use energy with 100% efficiency because all movement generates some friction and hence heat and loss of efficiency. Even electrons moving through superconductors generate minute amounts of heat. From a theoretical standpoint it's impossible to get 100% efficiency; all energy transformations increase entropy. Even if you could devise a machine with no friction, the process of converting energy from one form to another ALWAYS increases entropy. It's a result of the second law of thermodynamics. No machine can perform with 100% thermodynamic efficiency. The process used by any machine, be it steam, electric, horse drawn, wind, or whatever, can be reduced to a simple description of heat moving from a higher temperature to a lower temperature. The Carnot cycle provides a means to calculate the maximum theoretical efficiency possible. In reality, this maximum efficiency is NEVER achieved due to heat losses, friction, etc. Note that according to the Carnot cycle, 100% efficiency is impossible. The energy input to the machine can NEVER be entirely converted to useful work. Some of the energy is ALWAYS lost as heat to the surroundings.
Explain efficiency and how to calculate it for different simple machines?
Efficiency means to calculate that is the machine is efficient enough to save your bill or use less electricity. To calculate the formula is:Efficiency = Energy output (what is the machine producing) divided by Energy input (what is the machine taking or using).
Why are there no machines that use energy with 100 percent efficiency?
From a practical standpoint there are no machines that use energy with 100% efficiency because all movement generates some friction and hence heat and loss of efficiency. Even electrons moving through superconductors generate minute amounts of heat. From a theoretical standpoint it's impossible to get 100% efficiency; all energy transformations increase entropy. Even if you could devise a machine with no friction, the process of converting energy from one form to another ALWAYS increases entropy. It's a result of the second law of thermodynamics. No machine can perform with 100% thermodynamic efficiency. The process used by any machine, be it steam, electric, horse drawn, wind, or whatever, can be reduced to a simple description of heat moving from a higher temperature to a lower temperature. The Carnot cycle provides a means to calculate the maximum theoretical efficiency possible. In reality, this maximum efficiency is NEVER achieved due to heat losses, friction, etc. Note that according to the Carnot cycle, 100% efficiency is impossible. The energy input to the machine can NEVER be entirely converted to useful work. Some of the energy is ALWAYS lost as heat to the surroundings.
How does the scientific use of the word efficiency differ from the everyday use of word?
Everyday use of the word efficiency: to do something and accomplish it. Scientific use of the word efficiency: the ratio of the output to input energy.
How does the scientific use of the word efficiency differ the everyday use of the word?
Everyday use of the word efficiency: to do something and accomplish it. Scientific use of the word efficiency: the ratio of the output to input energy.
What is the efficiency of a generator that produces 80 kilowatts of electric energy and has electric and mechanical losses of 20 kilowatts?
power in equals power output plus power loss so input power for this question is 100 kw now use efficiency formula 100/80 times 100 to get 80% efficient
How many liters of water will it take to do 3 loads of wash?
It depends on the efficiency of your wash. Washing by hand is often the most efficient in terms of water use and machines (and wash cycles within machines) vary hugely in terms of their efficiency.
What is the difference between energy conservation and efficiency?
Reducing energy use is called energy conservation and efficiency is the percentage of energy that is actually used to perform work the rest of energy that is '' lost '' to the surrondings.
How does the scientific use of the word efficiency differ from the everyday use of the word?
Energy is scientifically defined as the ability to do work, and power as the rate at which work is done, or the rate at which work is expended.
Which energy is used in a Xerox machine?
All photocopy machines use electrical energy.
When do you use muscular energy?
to do work with or without the help of machines.
What is the best Home Improvement project for my house?
One way to approve the energy efficiency of your home is to go to the Energy Star website. On there, you can access the energy efficiency of your home as compared to other homes. After that, they can tell you how to better seal and insulate and how to heat and cool efficiently.
