T here's no such thing as alchemyâmagically changing common chemical elements into rare and valuable onesâbut electroplating is possibly the next best thing. The idea is to use electricity to coat a relatively mundane metal, such as copper, with a thin layer of another, more precious metal, such as gold or silver.therwise, when metal atoms from the electrolyte are deposited onto it, they won't form a good bond and they may simply rub off again. Generally, cleaning is done by dipping the electrode into a strong acid or alkaline solution or by (briefly) connecting the electroplating circuit in reverse.
*ahem*. More on the birth of Baby Yao Ming, a male Masai giraffe, from the Houston Zoo's official blog : Mom Neema delivered the healthy male calf at approximately 7:10 a.m. on Monday February 25 at the McGovern Giraffe Exhibit following a 14 month pregnancy. âThe calf weighs 62 kilos, about 139 pounds and stands 74 inches tall,â said Houston Zoo Hoofed Stock Supervisor John Register. Neema is five and a half years old.
How long is a female lion pregnant before she gives birth? The average gestation period for Lions is around 110 days. The female gives birth to a litter of one to four cubs in a secluded den usually away from the rest of the pride.