Using a lever, the load is lifted to a certain height. The lever efficiency is 95%. What does this mean?

The efficiency is 95%. This means 95% – useful energy used, 5% – energy “loss”.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.