Determine the mechanical energy of this object a 1 kilogram ball sits on a 10-meter high cliff

Mechanical Energy = Potential Energy + Kinetic Energy. But since the ball sits still on a cliff there is no KE. therefore, ME = PE. where PE = mgh. = 1x10^3 kg (9.81 m/s^2) (10 m) = 98.1 kJ. I hope this would help you in any way possible 

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.