It is maximum at one point which is the design condition and load applied in that case is called as full load i.e. 100% load. Thus, Full load efficiency : Efficiency at the 100% load. Part load efficiency : Efficiency at some specified load value below 100%.
If you are reasonably healthy, 10,000 steps a day is a good goal for you. It is the equivalent of walking about five miles per day. (I say about because the actual distance depends on your stride.) You certainly don't have to take all those steps at once, but accumulate them over the course of the day.
Not really. That's because the 10,000-steps-a-day recommendation has nothing to do with sedentary, fast-food-drenched circa-2015 America. Rather, the recommendation first popped up in a very different food and environment: 1960s Japan.