Beginning Of Basketball Essay -- History Basketball

The Beginning of Basketball Have you ever had an interest in how something was invented? An interest in how your favorite activity or hobby came about? Ever since I was introduced to sports and how competitive it was, I became hooked. I enjoy playing football, basketball, and baseball. Of the three main sports that I play, basketball seems to be my favorite. It challenges endurance, speed, accuracy, agility, and strength. I feel guilty not knowing who created the game that takes up most of my free-time. It is time for me to learn about the inventor and the games past. Basketball is one of the most popular games in the United States. There are many different versions of it based on where one has grown up. In the less fortunate areas of the United States, a type of basketball originated called And 1. It is all about stunning the crowd with tricks. This form originated a league of amazing basketball players that are sponsored by And 1. And 1 is a brand of basketball accessories, and the name of a team that travel from city to city. The And 1 team takes on other teams, with the same playing styles, that think they are worthy enough of playing them. This form of basketball throws out some of the rules, such as traveling and carrying, in order to broaden up the ability to achieve tricks. Although there are different versions of the game, the original game is one of the largest played world-wide. He was born on November 6, 1861 in Almonte, Ontario, Canada, where he later attended high school. The man of average height, and weighing about one-hundred eighty pounds, lead an amazing life. His name was James Nasmith. After James graduated high school, he accomplished many incredible things. Nasmith started in 1887 with getting his phi... ...y of such accomplishments would be responsible for creating the game of basketball. It amazes me that not only did he invent basketball, he achieved getting 4 degrees, served in the military, won awards for being best rounded athlete, was a professor, a minister, a basketball coach at the University of Kentucky, a director, and a doctor. James Naismith was also "the first to introduce the use of a helmet in American football" (James Naismith). It makes me wonder if there is a man in the whole world that has ever accomplished more than the great James Naismith. Works Cited "Hall of Famers-James Naismith" Naismith Memorial Basketball Hall of Fame. 2000. 27 Feb. 2007 "James Naismith." Wikipedia The Free Encyclopedia. 24 Feb. 2007. 27 Feb. 2007 Petersen, Mary "The Basketball Man (Dr. James A. Naismith)" Highlights for Children. November 1, 2005.27 Feb. 2007.

Comptuer Studies Ruby Notes

These are notes I took while I was learning Ruby. Comptuer studies ruby notes Instance of a class is a sub-category of that class. E. g. greyhound; dog. Every object has a class. Objects are instances of classes. Methods define what an object can do and properties describe it. Constants start with a capital letter, sometimes they are all caps e. g. INTEREST = 0. 012 #setting constant INTEREST to 1. 2% DOZEN = 12 #setting constant DOZEN to 12 Constants and variables store information in the memory for the duration of the use of the program.Like RAM? Constants can’t be changed but variables can be reassigned based on certain properties and data. Different types of classes: ClassExample of Object Float6. 5 or 3. 9 Fixnum2 or 3 StringThisisastring or randomnumber34 ArrayMonday Tuesday Wednesday Thursday Friday Or January February March April HashToronto [Dion Phaneuf] Pittsburgh [Sidney Crosby] Washington [Alex Ovechkin] Or Haseeb [November 18] Humza [August 6] Hana [August 11] Ra nge11.. 20 Or Hi.. Ho Float = decimal number Fixnum/Integer = whole number String = letters and numbersArray = an ordered list, a couple of objects put together in one list that can also be accessed independently Create a new array or reset an old one by using this: array = Array. new You can also show individual variables by doing: array[number] e. g. subjects[3] you can also add objects to the array by: subjects [4] = ‘Social Science’ Hash = Similar to array but not in order, each object does not have a number. It’s based on key and value pairs. Like if you put five names and assigned each a birthday. They would go based on those pairs. It assigns the first name to the second. E. g: friends = Hash. ew friends[‘Andrea'] = ‘July 22' friends[‘Mohammed'] = ‘April 9' Range = A sequence of values e. g. nums = 11.. 20 Setting variable: Fav_food = ‘pizza’ #setting variable fav_food to pizza The quote marks around pizza identify that fav_food is a string value. Identifiers are the constant/variables names In order to change a variable’s value (not class) from one to another use the following To string: x. to_s To float: x. to_f To integer/fixnum: x. to_i Keep in mind, this only changes the variables value based on class properties, not its actual class Scope is where the variable can be accessed r seen within a program. Some are only used for a small task while others may be used for larger tasks and appear several times within the program. Constants’ scope depends on how often it is declared. If a constant is only declared within a class or module it’s scope is within that scope or module. However if it is declared outside of that class or module it’s scope is wider or â€Å"global†. There four different variable scopes. Local variables are confined to the part of the program in which they are declared. If the variable is only declared within a method it is restricted to when that method is used or executed.It can’t be used anywhere else in the program. (e. g. fav_food) Global variables can be declared anywhere in the program and are accessible from anywhere in the program. They are identified by a preceding â€Å"$† e. g. $fav_food. Global variables, however have to be used with extreme caution due to the fact that their values can be changed anytime in the program, sometimes by accidental or careless coding, these accidents can cause huge problems and are not easily fixable. Class variables are confined to a specific class but once all instances of the class are created the value of the variable is shared amongst all instances.If the value is changed in one of the instances, it is changed in all of the instances. (e. g. @@fav_food) Instance variables are restricted to only certain instances of a class. If the value changes in one of the instances it stays the same in the others. (e. g. @fav_food) Commands to determine classes Either: put s variable. class or puts variable. kind_of? Class The first will tell you what class the variable is while the other will say true or false based on what class is inputted at the end of the line. Changing classes The easiest way is to just assign a new value to it.Another way is to use the to_s, to_i etc. commands while also using the â€Å"=† assignment operator in order to change the object’s class permanently e. g. num = num. to_s you can do it without the â€Å"=† and the num variable before the equals sign in order to change it temporarily All math operations are the same except for two. Modulo (%) Divides and gives the remainder and exponent is (**). E. g: X = 6%4 X = 20 ** 2 There are also comparison operators such as: puts a == b #false as a and b are not equal puts a ! = b #true as a and b are not equal puts a < b #returns true as b is larger puts a

Bohr Atom Energy Level Example Problem

This example problem demonstrates how to find the energy that corresponds to an energy level of a Bohr atom. Problem: What is the energy of an electron in the 3 energy state of a hydrogen atom? Solution: E hÃŽ ½ hc/ÃŽ » According to the Rydberg formula: 1/ÃŽ » R(Z2/n2) where R 1.097 x 107 m-1Z Atomic number of the atom (Z1 for hydrogen) Combine these formulas: E hcR(Z2/n2) h 6.626 x 10-34 JÂ ·sc 3 x 108 m/secR 1.097 x 107 m-1 hcR 6.626 x 10-34 JÂ ·s x 3 x 108 m/sec x 1.097 x 107 m-1hcR 2.18 x 10-18 J E 2.18 x 10-18 J(Z2/n2) E 2.18 x 10-18 J(12/32)E 2.18 x 10-18 J(1/9)E 2.42 x 10-19 J Answer: The energy of an electron in the n3 energy state of a hydrogen atom is 2.42 x 10-19 J.