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The efficiency of a heat engine is given by
n = Wu / QH
Where
Wu - is the useful work (7190 J)
QH - Heat taken from the hot reservoir (13,8 x 4184 J)
1 cal = 4,184 J => 1 kcal = 1000 cal = 4184J
So n = 7190 / (13,8 x 4,184 x 1000) J
and since you want that in percent multiply the result by 100.
What else can I help you with?
What temperature would the cold reservoir need to be for a Carnot engine to achieve 100 percent efficiency?
For a Carnot engine to achieve 100 percent efficiency, the temperature of the cold reservoir would need to be absolute zero (0 Kelvin). This is because the efficiency of a Carnot engine is given by 1 - (Tc/Th), where Tc is the temperature of the cold reservoir and Th is the temperature of the hot reservoir, and efficiency is maximized as Tc approaches absolute zero.
What do you mean by the efficiency of a simple machine is 85 percent?
When the efficiency of a simple machine is 85 percent, it means that 85 percent of the input work is converted into useful output work, while the remaining 15 percent is lost due to factors like friction and heat. This efficiency percentage gives an idea of how effectively the machine is performing its intended task.
What is percent efficiency?
Percent efficiency is a measure of how well a system or process converts input resources into output results. It is calculated by dividing the actual output by the theoretical maximum output, then multiplying by 100 to express it as a percentage. A higher percent efficiency indicates a more effective use of resources in achieving desired outcomes.
Can a machine have 110 percent efficiency?
Nothing can be more that 100% (one hundred percent)! When people say that something is one hundred and ten percent - they are wrong. It is an attempt to imply that something is greater that it should be. It is similar to the annoying habit of adding !!!! at the end of a sentence, when a single ! is correct.
What machine has an efficiency over 95 percent?
Electric induction motors typically have an efficiency of over 95 percent. These motors are commonly used in various applications such as industrial machinery, appliances, and electric vehicles due to their high efficiency in converting electrical energy into mechanical energy.
What temperature would the cold reservoir need to be for a Carnot engine to achieve 100 percent efficiency?
For a Carnot engine to achieve 100 percent efficiency, the temperature of the cold reservoir would need to be absolute zero (0 Kelvin). This is because the efficiency of a Carnot engine is given by 1 - (Tc/Th), where Tc is the temperature of the cold reservoir and Th is the temperature of the hot reservoir, and efficiency is maximized as Tc approaches absolute zero.
Does a reservoir have saltwater in it?
A reservoir contains 75 percent saltwater
What machine on earth has the greatest percentage of efficiency?
Perhaps an electrical AC transformer can have 99 percent efficiency. A loudspeaker can have only 1 percent efficiency.
Does a refrigerator have 100 percent efficiency?
nothing has 100% efficiency.
Which Mechanical efficiency has efficiency100 percent?
watches
Why can efficiency never can be 100 percent?
The laws of thermodynamics imply that there will always be some loss of efficiency.
What is mechanical efficiency in science?
mechanical efficiency is the percent of the energy that you put into a machine that was transferred to the load.
What is efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
SI unit for efficiency?
Efficiency is normally written as a percentage, and does not have an SI unit."percent". It has no units.
Can a car have a 100 percent efficiency?
No. Nothing mechanical can ever have a 100% efficiency by any physical evaluation.
What is the efficiency of an engine that gives off 70 percent thermal energy?
It is not a good efficiency engine.
What do you mean by the efficiency of a simple machine is 85 percent?
When the efficiency of a simple machine is 85 percent, it means that 85 percent of the input work is converted into useful output work, while the remaining 15 percent is lost due to factors like friction and heat. This efficiency percentage gives an idea of how effectively the machine is performing its intended task.
