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Efficiency as a percent is output/input * 100%

12000/15000 * 100% = 80% efficiency which makes sense, because it takes more work (input) than it give out (output). So the efficiency should be less than 100%.

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13y ago

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What is the efficiency of a car's engine when he input is 20000 joules and the waste heat is 15000 joules?

The efficiency of the car's engine is calculated by dividing the useful energy output by the energy input. In this case, the useful energy output would be 5000 joules (20000 input - 15000 waste heat), thus the efficiency would be 5000/20000 = 0.25 or 25%.


What is the efficiency of a device that takes in 40000 J of heat and does 12000 J of work while giving off 28000 J of heat?

Efficiency is calculated as the ratio of useful work output to the total heat input. In this case, the useful work output is 12000 J, and the total heat input is 40000 J + 28000 J = 68000 J. The efficiency would be (12000 J / 68000 J) * 100% = 17.65%.


What is the formula to finding the work output of efficiency?

The formula to find the work output of efficiency is: Work output = Efficiency x Input work. Efficiency is a ratio of output work to input work, so multiplying this ratio by the input work gives the work output.


What means work output divided by work input?

Work output divided by work input is known as the efficiency of a system. It represents the ratio of useful work output compared to the total work input required to perform a task. A system with high efficiency is able to convert a larger portion of input energy into useful output energy.


How do you find the input power in the electric efficiency formula if you have the output power and the efficiency percent?

Output equals efficiency times input; in formula, Ot = Ef x In and so In = Ot/Ef. To calculate the original input, divide the output by the efficiency.


What is the ratio of output to input?

efficiency


What is efficiency and how is it calculated?

The efficiency is output divided by input.


What is the term for the comparison of input and output work of a machine?

The term for the comparison of input and output work of a machine is efficiency. It is typically calculated as the ratio of output work to input work, expressed as a percentage. A higher efficiency indicates that the machine is better at converting input work into useful output work.


Which math ratio represents efficiency?

Efficiency = Output/Input.


Which shows relationship between work input and work output?

The relationship between work input and work output is defined by the efficiency of a system. Efficiency is a measure of how well a system converts input work into output work and is calculated as the ratio of output work to input work. A higher efficiency indicates a more effective conversion of work input to work output.


How do you find output force if you are only given efficiency and work?

You can find the output force by dividing the work done by the input force by the efficiency. This formula is: Output Force = Work / (Input Force * Efficiency).


What do you get when you divide input work by output work?

When you divide input work by output work, you get the efficiency of a system. Efficiency is a measure of how well a system converts input work into output work, expressed as a percentage. A higher efficiency value indicates that more of the input work is being used to produce output work.