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Q: What is the efficiency of an engine that does 288 Juoles of work and exhausts 72 Juoles of heat while taking in 360 J of heat?
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In physics what is power and efficiency?

Power(P) is the amount of Work(W) done in a given amount of time(t). Efficiency(e) is a measure of how effective a machine is. This is done by taking the ratio of output work(Wo) and dividing that by the work input(Wi). e=Wo/Wi X 100 Another way of determining efficiency is... e=AMA/IMA X 100 (AMA=Actual Mechanical Advantage) (IMA=Ideal Mechanical Advantage)


Will the efficiency of a car engine increase if the muffler is removed or if it is driven on a very cold day?

The efficiency of a car engine will probably increase if the muffler is removed, but this is not certain because the muffler offers some resonance in clearing the exhaust. The length of the exhaust pipe, and its shape is often a complicated task. But if it is driven on a very cold day the situtation is more clear, the efficiency will improve, often markedly.


What is efficiency in power?

Power is the amount of work(W) done in a given amount of time(t).Efficiency is a measure of how a machine is effective. This is done by taking the ratio of output work and dividing by the work inpute=Work/WI*100AnswerEfficiency is the ratio of a machine's output power to its input power, usually expressed as a percentage.A machine will always have losses, so its efficiency will always be less than 100%.Further to the original answer, 'effectiveness' and 'efficiency' are two completely-different concepts. Effectiveness (or 'efficacy') defines whether or not a device achieves what it is designed to achieve; efficiency provides a way of defining the losses that occur while the device achieves what it is designed to achieve. For example, a motor might be perfectly 'effective' at producing rotatary movement, but it loses 5% of its input power doing so. So it is 100% effective but only 95% efficient,


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Related questions

Define optimal efficiency How is optimal efficiency achieved in production?

Optimal efficiency is a term used to describe the condition when a production is producing the best it can with what it has at the lowest cost possible. It is achieved in production by taking all of the production's waste product and dividing the waste product by the overhead costs. A sum of zero is the optimal efficiency.


Why supercharger are not used in ci engine?

now a days superchargers are replaced by the turbocharger. supercharger is taking drive from engine while turbocharger taking drive from exhaust gases.


What are the 5 PEC's of achievement cluster?

Opportunity Seeking Persistence Commitment to the Work Contract Demand for Efficiency and Quality Risk Taking


Can you take NyQuil and valtrex together?

If both drugs are needed at the same time, there is no problem in taking them together.. It won't affect the efficiency.


How many gallons of gas does it take to drive 145mi with the time taking about 2 and a half hours total?

Depends on your vehicle's fuel efficiency.


What is the problem if the engine is taking in to much air pressure?

o2 sensor?


What are the release dates for Thomas the Tank Engine and Friends - 1984 Caring Taking Care?

Thomas the Tank Engine and Friends - 1984 Caring Taking Care was released on: USA: 10 September 2005


Where can you find the gas pomp relay in an 95 izuzu whit a 5.7 Chevy engine?

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Where is the Engine number located on a 2004 Murano engine?

looking at the engine right side by the rear head yo can see it without taking anything off


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).


Does taking off mufller hurt anything?

No, in fact, removing a vehicles muffler actually would increase an engines efficiency, but it would be excessively loud, of course.


Where is the OIL dip stick on a ford freestyle?

On a ( 2006 ) Ford Freestyle with the 3.0 litre " Duratec " V6 engine : The engine oil dipstick is at the front of the engine compartment next to the engine oil fill cap