Recent content by Allegro

In Chapter 11 of the IPCC ''Climate Change 2001'' Report an overview is given and the physical causes of the factors contributing to sea-level change are evaluated: http://www.grida.no/climate/ipcc_tar/wg1/408.htm The impact of the change of the sealevel on the population in coastal zones...

Pengwuino wrote: ''I find it funny that people are against anything nuclear...'' Not funny at all,just think about the disasters that happened (Harrisburg,Tsjernobil...),and will happen again.

Hello kashoo, Your question was which electronic calculator is the best suitable... In my profession (civil engineering) I use a TI-84+ graphing calculator. This is a cheap and versatile instrument,which, in just two weeks I use it, already proved to be indispensible. In your case you...

Hello Sigma, Some links: http://www.grc.nasa.gov/WWW/K-12/airplane/shaped.html http://scienceworld.wolfram.com/physics/topics/Drag.html

Hi, More about this subject,including exponents of r different from 2, see here: http://www.binaryresearchinstitute.org/pdf/gravi.pdf

Hello lagrange, The behaviour of tsunami is the behaviour of shallow-water waves. Therefor the velocity of the waves is given by the equation for the shallow-water phase- and group velocity. Here you'll find the linear theory of ocean surface waves...

Hello WHP, Indeed, in the graph it just '' looks'' that the peak is vertically intact. However, the horizontally and vertically scales of the graph are not the same, that is, the horizontal scale is ± 1cm=8 km and the vertical scale is ± 1cm=4km. So in fact, when using equal scales...

See also: http://www.es.ucsc.edu/~ward/papers/W+A.pdf

TeXaide Hello phoenixthoth, #1. Download TeXaide: http://www.mathtype.com/en/products/TeXaide/ #2. Type in an equation in TeXaide and copy it. #3 Paste it in your message on the Physics Forum,then go to my previous message and click on quote,then you can see how it is done...

Hello kishtik, See:http://scienceworld.wolfram.com/physics/Helicopter.html

Let's give it a try (using TexAide): \frac{{\sqrt s }}{{s - a^2 }} \displaystyle{\int_2^4 {\left[ {8(t - 2)} \right]^{-0.5} dt = } \left[ {\frac{1}{{\sqrt 2 }}(t - 2)^{0.5} } \right]_2^4 = 1} With compliments to TeXaide.

Cubics and quartics You can also use a numerical method,for instance the Newton-Raphson method, see: http://www.sosmath.com/calculus/diff/der07/der07.html

Nine point circle Hello Geometry, See http://mathworld.wolfram.com/Nine-PointCircle.html I think the sketch with four points A,B,C and D,four ninepoint circles ,two obtuse and two acute triangles are the ones you'r looking for. Regards.