What is the amount of Solid Gold actually used in the Gold medals at Sochi Olympics?
I have heard that they don’t use pure gold to make the Gold Medals. Is it true?
"Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum?"
" A. Radio waves B. Visible light C. X rays D. Gamma rays E. All of these travel at the same speed"
Because it is used to indicate reservation of service and locks out other requesting services.