# Air

Senior Members

31

## Profile Information

• Location
London
• College Major/Degree
Mechanical Engineering
• Biography
Female (Loving Science)
• Occupation
Student

• Quark

13

1. ## anthropos    Air

Cute display picture! Haha =D

2. ## Rearrangement?

I don't see how you 'boiled' it down. I get: $\frac{B}{W}=\sin x$ $\frac{F}{T}=\cos x$ $\frac{B}{W} \div \frac{F}{T} = \tan x$ $\frac{B}{W} \times \frac{T}{F} = \tan x$ $\frac{BT}{WF} = \tan x$
3. ## cos^2

$\cos ^2 x = \left(\cos x\right)^2$ Note that $\cos \left(45^{\circ}\right) = \frac{1}{\sqrt{2}} \therefore \cos ^2 \left(45^{\circ}\right) = \left(\frac{1}{\sqrt{2}}\right)^2 = ...$
4. ## fish bone and others

Structure of fish:
5. ## Our nearest star other than the sun??

The Sun is about 93 million miles from the earth. The star nearest to the Sun is Proxima Centauri. Proxima Centauri is 4.3 light-years from the Sun. It is a dim red star in the constellation of Centaurus that lies at a distance of over 40 million million kilometers, some 270,000 times greater than the distance between the earth and the sun.
6. ## Can pi be reduced to a rational number?

The proof of $\pi$ being an irrational number is a beauty. There is a few proof, such as seen on wikipedia: http://en.wikipedia.org/wiki/Proof_that_%CF%80_is_irrational
7. ## Wikipedia

It's a good reference source although it is one which I visit less frequently. I tend to use Google (search engine) through which I can find all my resources so don't always feel the need to refer back to wikipedia.
8. ## outside the universe

It was aimed at the OP. I've added his quote to avoid confusion. Sorry for any confusion that it may have caused.
9. ## Math and word processor

There is a program called MathType but it isn't free, you have to purchase it. I think you can get trials so try it out before you purchase it. It allows you to type mathematical notations. You don't need to learn the codes. Here's the link: http://www.dessci.com/en/products/mathtype/
10. ## outside the universe

This really depends on what you define as the "universe". If you are talking about the Observable Universe, then it simply expands into more of the same (more stars, more galaxies) - because it is defined by the distance of the most remote light we can see (imagine a sphere with a radious of some 13,7 billion years). If you define the "universe" as everything that can possibly be, then there is nothing into which the Universe can expand. This would make the Universe infinite (but not necessarily occupying an infinite space - simply all the space that is available!). Another way to view our Universe is to consider that it might be a part of a larger universe in which ours is only a small part (like an island in the ocean). This is actually just a modification of the first point above. However, depending on how each of the universes came into being, their physical laws and properties may be different.
11. ## Which is better Mac or pc

If your concentration is on: Art subjects: Then go for Mac. It is better graphically and visually. Science subject: Then go for PC. You may need to install many programs hence having a PC enables you to be sure that it can installed. At times, some programs cannot be installed on Mac.
12. ## Cool Facts

The universe is beige Cosmic Latte is the color of the universe, according to a team of astronomers from Johns Hopkins University. In 2001, Karl Glazebrook and Ivan Baldry determined that the color of the universe was a greenish white, but they soon corrected their analysis in "The 2dF Galaxy Redshift Survey: constraints on cosmic star-formation history from the cosmic spectrum", published in 2002. In this paper, they reported that their survey of the color of all light in the universe added up to a slightly beige white. The survey included more than 200,000 galaxies, and measured the spectral range of the light from a large volume of the universe. The hexadecimal RGB value for Cosmic Latte is #FFF8E7. In a Washington Post article, the color was displayed. Glazebrook jokingly said that he was looking for suggestions for a name for the new color. Several people who read the article sent in suggestions. "Cosmic Latte" was selected.
13. ## only sfn?

I'm on many sites including Google so I believe it is a problem down your end.

15. ## ChemSiddiqui    Air

Hi,

Go to my profile and join my social group!

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