Recent content by motai

All these new fast cars, what about other, less performing ones for old time's sake. :smile: Karl Benz's "Velo", 1894. (Btw that car was raced according to wikipedia, so its not like there weren't daredeveling racers back then)

http://en.wikipedia.org/wiki/Brfxxccxxmnpcccclllmmnprxvclmnckssqlbb11116 Names can't get too much longer than that...

In my experience the word problems in physics tend to be easier to conceptualize than equivalent word problems in mathematics (basing this on Halliday-Resnick-Walker 7th Ed). In that physics textbook, every single problem is effectively a word problem, but there is minimal mathematical modeling...

The first thing you want to do is split up \int sec^6tdt into components so some parts of it will cancel. You're on the right track, remember that sec^2t = 1 + tan^2t, and make a u substitution. If you go about it correctly, one of those sec^2ts will cancel and you will have the integral in...

Here is the way I look at it (while not necessarily rigorously mathematical, it makes sense): The friend of my friend is my friend (+)(+) = + The friend of my enemy is my enemy (+)(-) = - The enemy of my friend is my enemy (-)(+) = - The enemy of my enemy is my friend (-)(-) = + (I'm not sure...

The vertical and horizontal components of moving objects are independent of each other. This is why when someone jumps on a moving skateboard they will land in the same spot on the skateboard. In this case, the ball (and you) are moving at the same horizontal velocity as the car. When you...

Hybrid cars tend to be an exception. But buying any other (pure internal combustion) car will be cheaper in used form than new. "Drive a new car off the lot and it can lose 20 percent of its value." (http://www.edmunds.com/advice/strategies/articles/77147/article.html )...

Another problem with cars in general, besides the points that Chroot brought up earlier, is that they depreciate (dramatically) in value. Considering that most of the time, cars are either parked in garages or in parking lots, it seems like an awful waste of money for something that will only...

If one already knows how the layout of written music, and knows the context of scale passages and whatnot, then adapting that to any particular instrument isn't too hard presuming that experience with a previous instrument is there. However, if staff lines look rather alien, then there is...

Yes but that means that future oil executives won't have as nice of a retirement as this guy: https://www.physicsforums.com/showthread.php?t=117966 :rolleyes: I don't know whose idea it was to have most American cars have such low fuel efficiency, but it certainly was a rather bad choice...

That's the problem with AP courses. They teach you how to play the game, to resubstitute answers back into questions, to learn the tricks that would shift only a few students towards the right side of the bell curve. Thats not my only gripe about them though. AP courses (I have seen anyway)...

I'm sure the industrial engineer-types would be all over this one. "Lets see how many people we can cram into a Boeing 737." It would definitely make air transportation more efficient, and cheaper for those who have to fly. That and short people would get discounted fares for taking up less...

Interesting. I would have assumed that scuba diving wouldn't be considered risky, as it doesn't seem nearly as dangerous as skydiving. But even still, the odds of dying in either scuba diving or sky diving is less than the overall odds of dying in a car accident, which is roughly 1/360 if my...

Today I went to see a presentation by a speaker from the National Resources Defence Council on global warming, and they mentioned renewable energy but neglected talking at all about nuclear energy. This was somewhat foreign to me until I asked the speaker about it and he (basically played down...

That is very creepy. I wonder if the guy was dreaming that you were trying to stab him.