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Comment: Re:How did they launch from the moon? (Score 1) 204

by Waffle Iron (#47494905) Attached to: Apollo 11 Moon Landing Turns 45

I've never understood how they were able to launch from the moon back towards Earth. Launching from the Earth requires massive infrastructure and huge rockets. Yes, the moon's gravity well is shallower, but still significant.

It's because the fundamental equation that relates a rocket's performance and the mass fuel it requires to orbital velocities is exponential. This makes it work out so that any chemical rocket leaving earth has to have the vast majority of its weight as fuel, where as a rocket leaving the moon only about half of its weight as fuel.

What's more, the entire lunar module and its fuel supply is dead weight as far as the earth launch is concerned, which makes the earth rocket and its fuel multiple all the bigger. Then there's the issue of bringing along enough fuel to slow down the craft into lunar orbit, and escaping lunar orbit back to earth. The lunar lander didn't need to handle any of that, either.

Comment: Re:No (Score 2, Informative) 180

by Waffle Iron (#47420557) Attached to: Will Google's Dart Language Replace Javascript? (Video)

You might want to look in the mirror.

Scripting languages usually feature dynamic, strong typing. (The runtime always knows exactly what type its dealing with.)

Most compiled languages have static, strong typing. C is somewhat of an exception, being relatively weakly typed. (It's easy to make all sorts of bizarre type casts, sometimes implicitely.)

A few languages are very weakly typed, such as Forth.

Comment: Re:Externalities (Score 1) 262

by Waffle Iron (#47265815) Attached to: Elon Musk's Solar City Is Ramping Up Solar Panel Production

Most of the environmental issues from Coal have effectively been eliminated, except for the perceived C02 emission standard,

So, other than spewing the single largest existing threat to the welfare of human civilization, coal is just fine.

Meanwhile, by your arguments, the problem of setting up a recycling center for solar panels appears to be an intractible dilemma.

Comment: Re:Cabbies. (Score 5, Interesting) 314

by grub (#47226495) Attached to: California Regulators Tell Ride-Shares No Airport Runs
I was suggesting that the bulk of the complaints are likely coming from cabbies.

Michael Peevey mentions "safey rules" but then goes on to 'lacking airport permits, as well as lacking proper "trade dress" on their vehicles and lacking proof of insurance.' Ok, lacking proof of insurance I can understand. So carry papers in the glovebox and all is well.
Airport permits? That's just money denied to the airports. I'd wager the complaints that are not from cabbies are from the airport authorities for this very reason.
Trade dress? Fine, slap on a cheap magnetic sign. That is not a safety issue.

They dress is up as "safety rules" but the real motives are financial.

"Help Mr. Wizard!" -- Tennessee Tuxedo

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