Thanks, I have both of these and NASA's 'Eyes on the Solar System'. I like being able to visualise where things are when reading about different missions.
Thanks folks.
It was this set of images of Pluto that got me thinking.
http://www.nasa.gov/sites/default/files/thumbnails/image/nh-lorri-images-6-1-15.jpg
The images are annotated with a longitudinal value to give an idea of which face we're looking at. However at the time these were taken the...
To quote Prof. Robert Fovell (UCLA)
"Temperature differences cause pressure differences and pressure differences drive winds"
As for mixing, you're right in that 'packets' of air tend to resist mixing, however they will still seek to even out pressure differences, whereby a cold air packet will...
Like with a helicopter, the individual blades of the rotors can pitch about their long-axis.
Electronics use sensor information from accelerometers and navigation to control this in relation to the intended actions of the pilot and to adjust for movement in the center of mass.
This gives a...
I was 24 when I stopped using my native language English, and spoke pretty much only Danish for over 20 years, although I did read and hear it regularly. About 3 years ago I moved back to my country of origin.
We all have 2 parts to our vocabulary:-
Passive - these are the words we know when...