Recent content by R.Harmon

You've worked out the distance it takes to stop correctly, but I don't follow your working after that. You know the radius of the tyre is 0.4m, so it's circumference = 2Pi*0.4=2.5137. The car stops in a distance of 37.89 meters, so the number of revolutions is just the distance it takes to...

One way is to draw a line from each vertex of the triangle to the centre of the circle, splitting the equilateral triangle into 3 isosceles. If you consider one of these triangles, you can fairly easily work out all the internal angles, and you know the length of two of the sides of the...

I think there are a few applications that can do this, one that comes to mind is Eph Pod, but I'm not sure it has mac support. A quick google brings up a program called senuti which appears to be mac supported, but I don't have any experience with it so can't say if it's any good or not.

Nothing beats a good ploughmans..except maybe a BLT made with good bacon and a touch of mayo.

Consider the vertical motion of the particle. You know that v=u+at. Take the final velocity v to be zero (at the maximum height of the particle, and halfway through the motion). You know the time t (half of the total time), and the acceleration due to gravity. This let's you find the initial...

Hi, So I have a Sony VAIO laptop, and recently the batterys decided to stop being recognised by the computer (if I go to the power meter in the control panel, it reads the battery as "not present"), so I run off of AC power and disconnect the lead, the laptop just turns off. The problem is...

That definitely helps clear things up, thanks a lot everyone.

Hey, I decided to start learning python so I downloaded it yesterday and decided to try and make a simple program to produce the Fibonacci series. I managed to do it using a function similar to that on wikibooks: def fib(n): if n < 2: return n else: return fib(n -...

Saw Eric Clapton at the Albert hall a few years ago which was pretty amazing, I'd definitely go see him again. Play guitar myself and I do dabble in blues a bit, definitely one of my preferred styles of music to play.

Oh are you writing an article as opposed to a report/book? Try \renewcommand{\refname}{}

Try the substitution cos(x)^2.

If you just mean a spiral shape then something like (x,y,z)=(Sin(t),Cos(t),t) should work using a parametric plot (in mathematica anyway, I don't use matlab).

You can just put \renewcommand{\bibname}{} into your preamble, although because that's just renaming the title to be nothing, you get quite a bit of white space above your references which I'm not sure how you could get rid of, although it is a crude way to achieve what you want.

I found this in the wolfram library, looks quite a complicated way to do it but it seems to work, there might be a much simpler way but I don't know it: http://library.wolfram.com/infocenter/TechNotes/4116/

Not quite sure what you mean by mass of the circular orbit, but if you use U=\frac{-GMm}{r}, where G is the gravitational constant, M is mass of the earth, m is the mass of the sattelite, and r is the radius of the orbit, you should be able to work out the gravitational potential energy U. You...