The efficiency is (output energy)/(input energy) = 340/400 = 85%
55%
230/430 = 53.49% (rounded)
how do you when you have crossed a threshold for a mechanical device
Light pen is a mechanical or optical device? i don't know answer for this
That is called the "efficiency" of the device.
The rocket engine is the device that converts chemical energy into the mechanical energy. A firecracker also converts chemical energy into mechanical energy.
230/430 = 53.49% (rounded)
Even the best screws only have a mechanical advantage of twenty percent. Therefore, the screw is not a very efficient lifting device.
That's hard to compare; improving energy efficiency often requires you to change a complete device for another device, for example, a light-bulb for a light-bulb that uses different technology. Whether the new device will live longer depends on the technology used.
In general, efficiency is the ratio between the output of a device and the input, . For thermal efficiency, the input, , to the device is heat, or the heat-content of a fuel that is consumed. The desired output is mechanical work, , or heat, , or possibly both.From the first law of thermodynamics, the energy output can't exceed the input, so
Because, the losses of IM is more due to the contribution of friction losses at shaft bearings and wind age losses in rotor air gap, this reduces the efficiency of the equipment, Since transforms is a static equipment zero mechanical loss so efficiency of the equipments in high .
Mechanical input device
how do you when you have crossed a threshold for a mechanical device
A mechanical or electronic device that displays the time.
Light pen is a mechanical or optical device? i don't know answer for this
motor
A mechanical device that can work by means of fuel consumption. A mechanical device that can work by means of fuel consumption.
The device which convert mechanical energy in to electrical energy is "Dynamo".