Wondering if a machine could be said to be 100% efficient

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A machine can be considered 100% efficient if all forms of energy output, such as heat, light, and sound, are utilized without any waste. Electric heating serves as a prime example of this concept, as it converts electrical energy into thermal energy with complete efficiency. Even when accounting for minor outputs like gravitational waves from moving parts, the primary focus remains on the desired energy outputs being fully harnessed.

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I was just wondering if a machine could be said to be 100% efficient if for example it gave out heat, light and sound but all I these types of energy are wanted and not wasted?
Thanks for the replies
 
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If you want every output: Sure. Electric heating is basically 100% efficient, for example.
Add tiny amounts of gravitational waves, if there are moving parts ;).
 
I do not have a good working knowledge of physics yet. I tried to piece this together but after researching this, I couldn’t figure out the correct laws of physics to combine to develop a formula to answer this question. Ex. 1 - A moving object impacts a static object at a constant velocity. Ex. 2 - A moving object impacts a static object at the same velocity but is accelerating at the moment of impact. Assuming the mass of the objects is the same and the velocity at the moment of impact...

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