It means it is 14 k gold.
The number "928" on your gold necklace is likely a marking to indicate the gold purity, which is usually measured in karats. In this case, "928" likely means that the necklace is 22 karat gold, indicating that it is made up of 91.6% pure gold.
It most likely means the percentage of gold in the material.
It is a reflective plastic wrap. Mylar plastic coated with gold was used to reflect solar radiation that would otherwise overheat the spacecraft body. Gold-mylar film reflects both visible and infrared radiation.
It most likely means the percentage of gold in the material.
No, mylar is a type of polyester film that is resistant to most chemicals, including aqua regia. Aqua regia is a highly corrosive mixture of nitric acid and hydrochloric acid commonly used to dissolve noble metals like gold and platinum, but it will not dissolve mylar.
928/1
928 =92800%
Mylar can be bonded using adhesives specifically designed for plastic films like mylar. These adhesives create a strong bond by chemically interacting with the mylar surface. It's important to ensure that the mylar surface is clean and free of any contaminants before applying the adhesive to achieve a reliable bond.
Yes, Mylar is an effective reflector of heat.
It is: 928 = CMXXVIII
928 / 2 is equal to 464.