Final answer:
The condition for severe turbulence penetration related to the options provided is unclear without additional context, as the threshold values far exceed typical values for the onset of turbulence indicated by the Reynolds number, where turbulence generally occurs above an NR of about 3000.
Step-by-step explanation:
The condition for severe turbulence penetration seems to be related to a threshold value indicated by a number in your question, which likely corresponds to a dimensionless number like the Reynolds number (NR). In fluid dynamics, the Reynolds number is used to predict the transition between laminar and turbulent flow. The flow becomes turbulent when the Reynolds number exceeds a certain critical value.
According to the information provided and widely accepted fluid dynamics principles, for NR below about 2000, flow is laminar. For NR that will be above 3000, flow is turbulent. Therefore, the condition for severe turbulence would be significantly higher than the transition point.
However, the specific options given (500,000; 600,000; 700,000; 800,000) don't correspond to known critical values for the onset of turbulence. They are much higher than typical onset values and without additional context or reference to what these numbers represent (like a specific scale or modeling parameter), it is not possible to definitively answer this question correctly. The provided text suggests that a value of 700 TW (Terawatts) was used to corroborate the order of magnitude for a concept, potentially indicating turbulent wakes, but without context, it's not clear how this relates to the options presented.