What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

Ihave made a dive then stayed on the surface for a while. after this surface interval my pressure group is k. what is the maximum amount of bottom time available when doing a repetitive to 17/56 feet

Compare and contrast the environmental consequences of reliance on coal with reliance on petroleum.

Which amusement park ride utilizes periodic motion a.slide b.bumper cars c.giant swing d.roller coaster