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According to the Kalvin - Plank statement:-
It is impossible to construct a device operating in a thermodynamic cycle. which produce no effect other than work output and exchange heat with a single reservoir
and if it will be possible then it will called the PMM-2 (Perpetual motion machine of second kind).
because if the engine exchange heat only with one thermal reservoir then the entire heat is converted into an equivelnt account of work and efficiency become 100%.
What else can I help you with?
If the output work of a simple machine is than input work the machine is said to have less than 100 percent efficiency?
No, a simple machine with less output work than input work is said to have less than 100 percent efficiency. Efficiency is a measure of how well a machine converts input work into output work, with 100 percent efficiency meaning that all input work is converted to useful output work.
If the output work of a simple machine is than the input work the machine is said to have less than 100 percent efficiency?
input
Why don't modern fossil fuel power plants operate at or near 100 percent efficiency?
That's because they convert the energy to heat first. Do some reading about the Carnot cycle, or the theoretical Carnot engine; briefly, if (for example) the environmental temperature is 300K (27 degrees Celsius), and the heat engine operates at 900K (627 degrees Celsius), then the maximum theoretical efficiency is (900 - 300) / 900, or about 67%. The efficiency achieved in real machines, of course, will be less than that.
The efficiency of a machine is always less than 100 percent because?
some energy is always lost to factors like friction, heat, and sound during the operation of a machine, reducing its efficiency below 100%.
How does reducing friction increase the mechanical efficiency of a compound machine?
Reducing friction in a compound machine helps minimize energy loss due to heat and wear, improving the overall mechanical efficiency. With less friction, there is less resistance to the movement of parts within the machine, allowing it to operate more smoothly and with less effort. This results in increased performance and reduced energy consumption.
Is it possible that in an engine there will be an 100 percent efficiency without the presence of friction and other irreversibility?
No. No engine can be 100% efficient. The Carnot cycle is mathematically proven to provide an upper bound for efficiency. The efficiency of the Carnot cycle can be calculated from the formula:eta = 1 - Tc/THwhereis eta is efficiencyTc is the temperature of the heat sinkTH is the temperature of the heat source.The only way to make the (theoretical) efficiency 100% would be to have a heat sink at absolute zero (which is impossible due to the 2nd law of thermodynamics) or to have the heat source at a temperature of infinity (which is impossible due to the 1st law). Real engines always operate at an efficiency less than the theoretical because they operate on a less efficient cycle and/or posses real irreversibility in their operation. Consequently no engine - real or theoretical - can operate at 100% efficiency.
What would cause the calorimeter efficiency to be less than 100 percent?
why is the efficiency of a calorimeter less than 100%
How fast can a jet aircraft go?
conventional jet engines (using a compressor) will operate at speeds up to slightly less than Mach 1using an afterburner a conventional jet engine can operate at speeds slightly above Mach 3ramjet engines will operate at speeds up to about Mach 5scramjet engines can operate at speeds well above Mach 6However the maximum speed of of an actual airplane is usually less than the capability of the engines it uses.
Why do most very small engines operate on 2 stroke?
Most small engines are two stroke because you can get more power from a smaller engine with two stroke rather than a four stroke engine. It takes less to cool and to operate the engine.
If the output work of a simple machine is than input work the machine is said to have less than 100 percent efficiency?
No, a simple machine with less output work than input work is said to have less than 100 percent efficiency. Efficiency is a measure of how well a machine converts input work into output work, with 100 percent efficiency meaning that all input work is converted to useful output work.
Why a normal machine could not have the mechanical efficiency of 100?
Because there is always going to be friction, the efficiency of any machine will always be less then 100 percent.
If the output work of a simple machine is than the input work the machine is said to have less than 100 percent efficiency?
input
Why don't trains use petrol engines?
Trains primarily use diesel or electric engines instead of petrol engines due to their efficiency and power requirements. Diesel engines provide greater torque and are more suitable for the heavy loads and long distances typical of train operations. Additionally, electric engines are more efficient for high-speed travel and can utilize overhead power lines or third rails, making them a more sustainable option. Petrol engines, on the other hand, are less efficient for such applications and are not designed for the scale of energy needed to operate trains effectively.
Are diesel engines set to run rich?
Diesel engines are generally designed to run with a lean air-fuel mixture, meaning they use more air and less fuel compared to gasoline engines. However, under certain conditions, such as during heavy acceleration or cold starts, they may temporarily run richer to provide more power and reduce emissions. Overall, the efficiency of diesel engines comes from their ability to operate with excess air, leading to better fuel economy and lower emissions in typical driving scenarios.
Who is better gasoline engine or diesel engine?
diesel. Diesel engines tend to have better efficiency especially at less than full load. Gasoline/Petrol and LPG engines tend to have better power weight ratios.
Thermal efficiency in a coal fired power plant?
It can be up to 40 percent in modern plants, less in old ones
Why some engines run on high octane gasses and others on low?
Engines that run on high octane gasoline are typically designed to operate at higher compression ratios, which enhances efficiency and power output but also increases the risk of knocking or pre-ignition. High octane fuel can withstand greater pressure without detonating prematurely, making it suitable for performance-oriented and turbocharged engines. In contrast, engines designed for low octane fuel operate at lower compression ratios, where the risk of knocking is minimized, allowing them to function efficiently with less expensive, lower-octane gasoline. The choice of fuel is thus dictated by the engine's design and performance requirements.
