Category Archives: Mathematics

StratoLaunch

Here’s an article at the WaPo about it. This isn’t correct, though:

It is always desirable to launch to the east to capi­tal­ize on the direction of the Earth’s spin. The Earth travels about 1,000 mph west to east at the equator; you need to reach a speed of 17,000 mph to get to low-Earth orbit, so there’s no point in penalizing yourself 1,000 mph by heading in the wrong direction.

No, not “always.” Only for low-inclination orbits. For very high inclination, or retrograde, it’s actually preferable to launch from a high latitude (ideally, for a retrograde orbit, you’d like to launch from a pole, to eliminate any earth rotation, because it’s rotating in the wrong direction).

McDonalds Math

This sort of thing is why we don’t want economic illiterates in charge of the economy. Hey, morons. Don’t you think that if McDonalds could just raise their prices (and hence revenues) by 17% (actually 26%), they’d have already done that?

[Update a while later]

Another question:

Let’s say McDonald’s decided to double all its salaries, so that the entry-level wage became $16 an hour instead of $8 an hour. Why would McDonald’s continue to employ their $8 an hour workers when instead they could hire “better” workers who are worth more? (And those of you who think that the skills, linguistic abilities, experience, intelligence, etc. of fast-food workers makes no difference in service don’t eat in McDonald’s much.)

Again, this is why you don’t want people making policy who don’t understand how business works. And this administration (and sadly, Congress, of both parties, but much more so among the Democrats) is full of such people.

The Climate Models

On the verge of failure.

It’s an interesting exercise to attempt to model climate, but the notion that we should base public policy on these toys, particularly given the incompetence of many of those doing it, is insane.

[Update a while later]

It’s worth quoting the conclusions here:

It is impossible to present reliable future projections from a collection of climate models which generally cannot simulate observed change. As a consequence, we recommend that unless/until the collection of climate models can be demonstrated to accurately capture observed characteristics of known climate changes, policymakers should avoid basing any decisions upon projections made from them. Further, those policies which have already be established using projections from these climate models should be revisited.

Assessments which suffer from the inclusion of unreliable climate model projections include those produced by the Intergovernmental Panel on Climate Change and the U.S. Global Climate Change Research Program (including the draft of their most recent National Climate Assessment). Policies which are based upon such assessments include those established by the U.S. Environmental Protection Agency pertaining to the regulation of greenhouse gas emissions under the Clean Air Act.

In other words, all of the president’s latest job- and wealth-destroying power grab.

[Update a few minutes later[

Failure deniers– the problem with public-sector science:

Private companies which kill products or ideas administer the pain quickly and move on. If government ever tries to end a program or operation — “ever” is the operative word, as Ronald Reagan frequently noted: ”The nearest thing to eternal life we will ever see on this earth is a government program” — they go about it slowly, in hopes that outraged politicians or constituents will come to their rescue. If total termination ever occurs, they call it “a learning experience,” which of course was carried out with other people’s money, and rarely includes any learning.

Because they can do it with other peoples’ money. Time to take their (that is, our) money away.