Derek is a gymnast, and his favorite event is the rings. To score well, he is required to hold a position for several seconds before continuing into the next move. In his favorite move, he performs shoulder abduction to form a "T" and then holds it without moving. While Derek is holding this position, what type of contraction is his deltoid performing? A. An eccentric contraction B. A concentric contraction C. A static contraction D. A dynamic contraction

what test are you taking

one day because their over eating or whenever it kicks in their body

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.