Monday, October 31, 2011
Hulk's costume party!
Hulk have costume party.
All Hulk's friends come.
Hulk is Harry Potter.
Hulk's friend rockman is Ron Weasley. Silver Surfer come as Voldemort. Hulk smash Voldemort!
Hammer sing for party. He sound bad.
Tony come as Caesar. Web-head come as ghost.
Claw and Cyclops come as pirates. Claw and Cyclops fight. No fighting at Hulk's party! Cyclops say he sorry. Claw not apologize.
Cap come as Uncle Sam.
Hawkeye come as Robin Hood.
Torch come as himself. Tony disapprove.
Hulk give costume prize to superhero who come as Green Lantern.
Hero say he actually Green Lantern. Cap say "That's un-American!"
But Hulk say all superheroes invited to Hulk's party!
Wednesday, October 19, 2011
Distinguishing Gamma Rays From X-Rays
In 1896, just a year after Wilhelm Roentgen had discovered x-rays, the French physicist Henri Becquerel discovered a new kind of ray, quite similar to x-rays, but originating from uranium. He labeled it "metallic phosphorescence", while in actuality what he had observed was gamma radiation (being emitted by radium-226, a part of uranium decay). In 1900 the French chemist and physicist Paul Villard identified gamma radiation while studying the radiation produced by the substance radium. It was not until 1903, however, that Ernest Rutherford named the rays gamma rays, gamma being the third letter in the Greek alphabet, to distinguish it from the alpha and beta rays (thorium* and uranium, respectively) that he [Rutherford] had already discovered.
The original distinction between x-rays and gamma rays was the wavelength. Radiation producing a wavelength below a number such as 10−11 m was labeled as gamma radiation, while radiation producing a wavelength above it was called an x-ray. However, as longer wavelength gamma radiation emitters were found, the distinction begin to overlap. Now they are distinguished primarily by their source; x-rays are emitted by the electron fields outside the nucleus, while gamma rays originate in the nucleus itself. Both gamma rays and x-rays are part of the electromagnetic spectrum.
*Thorium is an element that the Swedish chemist Jons Jakob Berzelius named after Thor, the god of Thunder
Wednesday, October 12, 2011
Hulk eat!
Hulk use this to make cookies today. Work good. Hulk recommend.
Thursday, October 6, 2011
Hulk Like!
Hulk like Harry Potter and It's Just Some Random Guy's movie staring Hulk's friends.
Hulk cook!
Hulk's friend Tony sell Hulk a barbecue. Hulk make hamburgers.
Hulk wear new apron that Hulk knit. Hulk cook!
Tuesday, October 4, 2011
Gamma Radiation Shielding
I know from experience that exposure to gamma radiation can produce undesirable and unpredictable results. When working with gamma radiation, or any radiation, it's important to maintain secure radiation shielding.
There are three controlling factors of dosage from a radioactive source. These factors are time, distance, and shielding. The time of exposure reduces the dosage proportionally, while the distance from the source reduces it according to the inverse square law. Shielding reduces dosage by absorbing or scattering the radiation, thus reducing the radiation exposure level. Due to the nature of gamma rays, nearly any material, if used in sufficient amounts, can be used as shielding from gamma rays. However, since greater energy requires greater shielding, which translates as greater thickness, the most practical material so far has been lead, largely due to its density.
Depleted uranium is also used, mainly for transporting gamma ray sources. The primary advantage of depleted uranium over lead is the bulk, since it is 68.4% denser than lead, thus requiring less material to create the shield. On a side note, depleted uranium is also weakly radioactive, albeit 40% less radioactive than uranium and primarily emits alpha particles which can be shielded by paper or skin.
No entirely satisfactory solution has been found yet. For now, those working with radiation, either occupationally or medically, can be safest abiding by the ALARA rule: when working with radiation, use a dosage that's As Low As Reasonably Achievable.
Hulk friend
Hulk friend, rock man, come over today.
Rock man strong. Lift whole box of candy.
Brick in way. Rock man says he move it.
Hulk smash it.
Hulk and rock man build sandcastle.
Hulk smash it.
Rock man stay for lunch. Hulk has peanutbutter and jelly sandwich. Hulk not like the crust.
Hulk smash it.
Rock man go home.
Monday, October 3, 2011
Hulk eat!
Hulk need red head's giant ice cube for Hulk's drink. Red head said not ice cube but powerful cosmic cube. Hulk don't believe him and tried to get it but red head ran away. Hulk not happy.
Hulk smash popcorn instead of red head's face.
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