No never. Ever-thing has a loss.
Ideal conductors, such as superconductors, can theoretically transform 100 percent of the energy they receive into useful energy due to their zero resistance properties. However, in practical applications, perfect energy transformation is not achievable due to losses from factors such as heat, friction, and inefficiencies in energy conversion processes.
If the error in the measurement of momentum is 100 percent, then the error in the measurement of kinetic energy will be 200 percent. Since kinetic energy is proportional to the square of momentum, if the momentum is off by 100 percent, the kinetic energy will be off by 200 percent.
When a light bulb converts 10 percent of electrical energy, two forms of energy produced are light energy and heat energy. Since light bulbs are not 100% efficient, some of the electrical energy input is lost as heat energy.
An electrical fan produces mechanical energy and kinetic energy by converting electrical energy into motion to generate airflow.
The efficiency of an actual machine is always less than 100 percent, as no machine can convert all input energy into useful output energy due to factors like friction, heat loss, and inefficiencies in the system.