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.
1. Anaerobic A-Lactic (ATP-CP) Energy System. Athletes who compete in sports that require high amounts of short duration acceleration-shot-putters, weight lifters, American football linemen, gymnasts, or sprint-distance speed skaters use the anaerobic a-lactic system.