508 karma · joined May 11, 2011
http://www.roadandtrack.com/new-cars/car-technology/news/a25...
Apple handles this a lot better, they get applause and cheers, but it always seems to be at the right time. Is it because their audience is apple employees highly trained to give feedback on cue?
http://www.fischertechnik.de/en/Home.aspx
Had a lot of fun with this in my childhood.
Yes, you can reach mercury quite quickly, but in order to land on it (or get captured into its orbit) you need to match its speed and its direction of travel. (speed and direction together are velocity, remember).
It's like I'm a stuntman jumping from one car to another on the freeway. If one car is going 60mph and one is going 20 mph it's going to end badly.
You'll start with a certain velocity on earth, and end up with a target velocity when you reach your destination. That's the delta-v. The type of rocket and how much propellant you have determine the delta-v.
Once you've made your rocket burn, you just have to wait until your paths cross. So, that's why it can take a long time for these missions. That's why people always talk about a journey time of 235 days to mars.
This is not the only possible way to do it though, it just uses the least fuel. If you're willing to use a lot more fuel, you can speed things up significantly, but generally we don't do that.
https://en.wikipedia.org/wiki/Exigent_circumstance
"An exigent circumstance, in the criminal procedure law of the United States, allows law enforcement, under certain circumstances, to enter a structure without a search warrant or, if they have a "knock and announce" warrant, without knocking and waiting for refusal."
That's why the main thermostat doesn't do much.
What is it going to feel like when we find little cockroaches on Mars, or fish in the oceans of Europa? It's going to be profound in that we're not the only place where life has developed. It will be scientifically interesting because we will want to know how life developed differently, is there an alternative to DNA, for example. Is it non-water based, non carbon-based?
But many many people are going to have a 'meh' reaction. We have plenty of life surrounding us that we can't talk to. What's the big deal.
What if life developed on the remote planet that is 99% as sophisticated as us, like chimps for examples, but didn't make the final step to civilization because they didn't have opposable thumbs or something. They won't be able to comprehend us, or what we are.
There's a recent Onion article covering this topic:
"Nation Demands NASA Stop Holding Press Conferences Until They Discover Some Little Alien Guys"
http://www.theonion.com/article/nation-demands-nasa-stop-hol...
https://www.ted.com/talks/james_howard_kunstler_dissects_sub...
https://www.ted.com/talks/james_howard_kunstler_dissects_sub...
The particular case is that a driver going straight will yield to a driver approaching from the other direction who wants to turn left across them. They should not yield. They have a green light.
But other than those minor quibbles, it's neat!
Some people will still do that and be surprised at the result.
My dad once reformatted his memory card on his camera, losing all his pictures from his vacation. He wanted to 'Change the Format' of the image (why? who knows), but instead he reformatted the card. "Are you Sure? Yes!"
I once copied an empty partition over a full partition instead of vice versa. I knew I only had one copy of this important data, and was trying to back it up. Are you sure? double-check.. YUP!
https://www.youtube.com/watch?v=hBrW2Pz9Iiw
It was considered a turning point in the debate, from what I understand.
Fred was well known around the area as a steam-machine-tinkerer extraordinaire.
So, a few days later, the spreadsheet came back, and the HR director was ready to process all these raises into payroll. My friend took a look at the sheet, and nothing made sense. Low performers were getting high raises, and vice versa.
After some investigation it turned out that some of the managers had sorted the spreadsheet so that they could find their employees better. But someone had screwed up, and only selected the name column. So, everything got messed up.
What was amazing that even after this was pointed out, the HR director was still pushing for the raises to go through as-is, because it would take too much time to do everything again.