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.
ATP (Adenosine triphosphate) is used to power the muscles. ! The energy used by muscles ! Very little ATP is stored in the muscle. ! ATP must be continuously replenished to provide a steady supply of energy to muscles. ! In your body, there are 3 energy systems that make ATP in the muscle cells.