Tag Archive for Gray

The gray (symbol: Gy) is the SI unit of absorbed radiation dose of ionizing radiation (for example, X-rays), and is defined as the absorption of one joule of ionizing radiation by one kilogram of matter (usually human tissue).
Named after the British physicist Louis Harold Gray, the SI unit replaces the traditional cgs unit, the rad (equivalent to 0.01 Gy), which remains common in industry in the United States, while “strongly discouraged” in the style guide for U.S. National Institute of Standards and Technology authors.
One gray is the absorption of one joule of energy, in the form of ionizing radiation, divided by one kilogram of matter.
For xrays and gamma rays, these are the same units as the sievert (Sv). To avoid any risk of confusion between the absorbed dose (by matter) and the equivalent dose (by biological tissues), one must use the corresponding special units, gray is used instead of the joule per kilogram for absorbed dose and the sievert instead of the joule per kilogram…

Gray LA Skateboard Lessons!

Discover Skateboarding in a Week-Long Course

Do you want to learn how to skateboard?
Understand all of the basics of skateboarding fast in a one-week camp. We will show you the basics of skateboarding such as how to balance, push, turn, proper foot placement, and how to stop. Regardless, of where you…

Gray IA Skateboard Lessons!

Learn Skateboarding in a Week-Long School

Do you want to learn how to skateboard?
Is the fear of falling keeping you from progressing? Study all of the basic principles of skateboarding fast in a one-week camp. We will show you the principles of skateboarding like how to balance, push, turn, proper foot placement,…

Gray IA Skateboard Lessons!

Learn Skateboarding in a Two Week-Long Course

Do you want to learn skateboarding?
Is the fear of falling keeping you from progressing? Study all of the basic principles of skateboarding fast in a one-week camp. We will show you the basics of skateboarding like how to balance, push, turn, proper foot placement, and…

Gray KY Skateboard Lessons!

Improve Your Skateboarding in a Two Week-Long Course

Do you want to learn how to skateboard?
Find out all of the fundamentals of skateboarding fast in a one-week camp. We will teach you the basics of skateboarding like how to balance, push, turn, proper foot placement, and how to stop. Regardless, of where…

Gray TN Skateboard Lessons!

Learn Skateboarding in a Week-Long Course

Skateboarding is a pastime activity, a work of art, or a method of transportation. Skateboarding has been molded and influenced by many skateboarders throughout the ages. A 2002 report by American Sports Data discovered there are 18.5 million skateboarders in the world. 85 percent of skaters…

Gray GA Skateboard Lessons!

Learn Skateboarding in a 7 Day School

Do you want to learn how to skateboard?
Find out all of the fundamentals of skateboarding fast in a one-week camp. We will show you the basics of skateboarding like how to balance, push, turn, proper foot placement, and how to stop. Regardless, of where…

Gray PA Skateboard Lessons!

Improve Your Skateboarding in a 7 Day Lesson

Skateboarding is a pastime activity, an art form, or a method of transportation. Skateboarding has been designed and influenced by many skateboarders throughout the years. A 2002 survey and study by American Sports Data uncovered there are 18.5 million skateboarders in the world. 85 percent…

Gray ME Skateboard Lessons!

Learn Skateboarding in a Week-Long School

Do you want to learn skateboarding?
Study all of the fundamentals of skateboarding quickly in a one-week camp. We will show you the basics of skateboarding like how to balance, push, turn, proper foot placement, and how to stop. No matter, of where you are at..…