It’s immediately shocking when one considers how large the USA Defense budget is. The F-35 fighter is projected to cost a little over a trillion dollars (yes, TRILLION). Now I’ve read that they are planning new nuclear submarines, at a cost of $100B. To put this in a (scientific) perspective, then entire international cost of…
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Aircraft wing lift
I always thought that the flow/pressure explanation, the Bernoulli Effect, was wrong, in explaining why wings produce lift. It seemed obvious to me that the angle of attack produces a direct momentum transfer. This is described in an article in the Guardian. First item in that article.
RTD bus travel disincentive
I found out today that when one uses prepaid bus tickets that one can use only one at a time. The regional passes have a value of $5. If the fare is $10, one cannot use two tickets. I suppose the reason is that the ticket is purchased at a discount. Let’s say the price…
Retired!
I retired today! December 31, 2013 I sipped champagne. After all, it is also New Years Eve! I looked up a the high clouds passing overhead and thought about the wonder of the world, and the Universe. It has all reopened to me! When I was a kid, I thought about all of this and…
How many people are there on the Earth?
A climate researcher, Jacob Schewe, wrote an article about climate change and clean water resources, stating that there are six billion people on the Earth, now. This is published in The Conversation, which has a tagline of “Academic Rigour, Journalistic Flair”, on Dec. 23, 2013. This misstatement is in the second paragraph. It begs the…