Bally Heck
We're not arguing with Sir Isaac. I realise how a momentum balance works, but the original question was nothing to do with that. It was about what happens to the proportion of 'waste energy' which, within the atmosphere, would normally be dissipated as sound. (From a jet/rocket engine [delete where inappropriate], that is - not from some sort of wind-rush noise, which I realise will be non-existent.)
My answer is that the vibration is damped by internal cyclic stresses of the structure, converted to heat, and radiated out into space.
Please explain to me how this conveys a lack of understanding of Newtonian physics.
Pie
[This message has been edited by Pielander (edited 27 June 2001).]