Rate of change in calculus is a series I have been wanting to do for a while. If you are a student and just starting then your in the right place. This is the very beginning of calculus and where you want to start your learning. Since there are so many topics in school that require some calculus, I felt it was important to get some basics up here for you.Continue reading...
So you are writing a paper and you need to display formulas or math in it. Then this quick beginning Latex tutorial is for you. Your paper needs to be accurate and look good. You then go to your favorite word processor to type things out. It is then you discover, maybe for the first time, that regular text editors can not do math very well. You may be trying to display physics equations, biology genes, or chemical formulas.
Whichever it is, you realize you have to be super creative to even approach the accuracy that you want. At this point you will probably start asking around or researching the best way to do this. Well let me tell you folks, there is a better way. This is when most people find out about the wonderful Latex typesetting environment. Read on and I will explain as simply as I can about Latex.Continue reading...
Basic Chemistry Concepts For Beginners
What are Star Classifications
Have you ever wondered about star classifications ? Stars are classified based on their temperature, but started out being based on only their spectra. This classification process started in the 1890s by Edward Pickering at Harvard and was finished in 1901 by Annie Cannon, who worked for Pickering. Cannon reorganized what Pickering started in the classification that we know today. The classification is as follows "O B A F G K M" that goes from the hottest stars to the coolest stars. These classifications are further subdivided in categories "0-9" where 0 refers to early in that star and 9 refers to a late type of star.
This classification is now called the Harvard Spectral Classification. Type O stars and Type B stars are both blue-white hot stars, but Type O stars are the hottest stars. Type A stars are white stars that give off Balmer absorption lines in early A stars. Type F stars are yellow-white stars. Type G stars are yellow stars like our Sun. Type K stars are cool orange stars, whose spectra is dominated by metal absorption lines. Type M stars are cool red stars, whose spectra is full of molecular absorption lines. The Sun is classified as a Type G2 star with a surface temperature of 5777 Kelvin. These spectral classes also relate to the surface temperatures of the stars.