"This milestone completes the certification of the 787-8 airplane, and allows airlines to now operate the GE engine-powered 787 with both the baseline Block 4 engine and the PIP1 engine upgrade." Source: Mike Sinnett, vice president and chief project engineer for the 787 program.
Weather maps that are produced for the portion of the atmosphere above the lower troposphere, generally at and above 850 mb. Isolines on these maps usually represent the heights of a constant pressure surface, such as the 500 mb surface.
What speed can a skydiver reach during freefall? Like so many things in life, it depends. The terminal velocity of a falling body occurs during free fall when a falling body experiences zero acceleration.
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