a light year is the distance light will travel in a year which is a long long way light travels 186000 miles a second 300000 kilometers per second so a light second is 186000 miles 300000 kilometers
Best Answer: The ATP-PC system is use for around 10 seconds of an event, the ATP is use for 4-6 seconds before the creatine phosphate (CP) provides energy for a further 5 - 10 seconds. Weight lifting is the best example of a sport using the ATP-PC system.
The normally accepted view is that the energy systems are used almost one after the other. The ATP/CP system turns on when the first vigorous movement occurs. There is ATP stored in the muscles, enough to last around 2-4 seconds. This creates ADP when used. have have tried to think of how this energy model would work in a fell race or orienteering event. As you set off, the muscles use up the ATP/CP supplies quickly. Then, for the next couple of minutes, the anaerobic system provides energy before running out.