Isotopes are variants of a specific chemical element. For example, uranium-238, uranium-235 and uranium-234 are three isotopes of the element uranium. The listed numbers are the mass number and each isotope has a different mass number. This number is calculated by adding the amount of protons and neutrons that the isotope contains in the nucleus and it is one of the differences between isotopes from the same element. Let’s find out some of the most common similarities and differences between these isotopes.
James Franco is a celebrity actor who came to fame on the cult television program “Freaks and Geeks”. He initially took up acting to overcome shyness and loved it so much that he dropped out of college to pursue his new dream. His starring role in “Freaks and Geeks” came not long after and launched his career. He became a worldwide name with a supporting role in the 2002 film “Spider Man” and he has continued to land important roles since this time. In 2011 he was nominated for an Academy Award for his starring performance in the film “127 Hours”. The following is a list of movies that James Franco has acted in during his career so far.
The Voyager program consists of two unmanned space probes (Voyager 1 and Voyager 2) that were launched in 1977 to study the planets Jupiter and Saturn. These probes were built by the Jet Propulsion Laboratory and are funded and controlled by NASA. The probes were not only successful in this mission, but have continued their journey to the outer solar system and are still operational today. If you have ever wondered how they are powered and how they have remained running after all of these years, keep reading to find out.
The USS Maine was the second pre-dreadnought battleship in the United States Navy. The ship was ordered in 1886 as a response to the growing naval power of several South American countries, particularly Brazil which had become home of the most powerful navy in the Western Hemisphere. The USS Maine was completed in 1890 at a cost of approximately $4.7 million. Unfortunately, the USS Maine is best known for being sunk in 1898 and a total of 274 men lost their lives. Let’s take a look at where and why this tragedy happened.
A dream is a group of images, emotions and/or thoughts that occur in the mind during sleep. The cause and reason for dreaming is not well understood and many different theories have been developed on the subject. Dreaming usually occurs during rapid-eye movement (REM) sleep because the brain activity is high during this time. Dreams can occur at other stages of the sleep cycle, but they are generally not remembered after waking. The content of dreams can vary widely and the dreamer cannot usually control the dream. A person does not remember all of their dreams, but being awoken during a REM cycle means a dream is more likely to be remembered. You may have heard the urban legend that states an average dream lasts for 3-7 seconds. Let’s find out if that is commonly repeated fact is accurate.
Dwarfism is a medical condition that causes a person to grow more slowly than usual or with delayed growth. This condition either occurs as disproportionate dwarfism, where the individual has one or more larger or smaller parts of their body, and proportionate dwarfism where the body is normally proportioned, but is unusually small. Dwarfism is generally defined as a full grown height of less than 147 cm (58 inches). People suffering from this condition are generally referred to as a dwarf, little person or person of short stature. The term midget has also been used, but is usually considered to be offensive. If you have wondered what causes this condition, read on to find out.
Wheaties is a brand of breakfast cereal most well known for featuring famous athlete on the cereal box. The cereal was invented in 1922 after a mixture of wheat bran was accidentally spilled onto a hot stove. 2 years later the wheat flakes went on sale as Washburn’s Gold Medal Whole Wheat Flakes. The name was changed to Wheaties after a naming contest was won by the wife of a worker at the company. The cereal was first associated with sports in 1927 when they advertised at a minor league ball park in Minneapolis and sponsored the radio broadcasts of the Minneapolis Millers. This was the first time that the “Breakfast of Champions” slogan was used. In the 1930’s the company began to display athletes on their cereal boxes.
A jail, also called prison, is a correctional facility designed for housing prisoners that are awaiting a trial or have been convicted of a crime. Although the term jail and prison is often used interchangeably the words can be used to explain the differences between facilities. In this case a jail refers to a facility that houses people awaiting trial or those serving a short sentence and a prison is for offenders serving long term sentences. The goals of these facilities is to serve as a punishment and deterrent, prevent more crimes, remove dangerous criminals from the public and/or rehabilitate the prisoners to prepare them for a productive life after prison.
Antlers are the large growths that are found on the heads of many deer species. It is mostly the male members that have antlers, but female caribou and reindeer also have antlers. The main function of the antlers are as a weapon and defense. Male deer often use the antlers to battle another deer in a show of dominance and as a way of attracting a mate. Antlers are usually shed after the breeding season and the deer grows new antlers soon after this occurs. Antlers are a prized hunting trophy and are often mounted for display. Let’s take a look at the composition of deer antlers.
“Alice in Wonderland” is a fictional novel about the adventures of a girl named Alice who enters a fantasy world after falling down a rabbit hole. The story has many interpretations and this is one of the reasons that it is been popular with both children and adults. The story has inspired many adaptations including numerous film and television adaptations, comic books, radio plays, stage productions and even a ballet. If you have ever wondered who wrote this popular book, continue reading to find out.