A spark plug is made of a center electrode, an insulator, a metal casing or shell, and a side electrode (also called a ground electrode). The center electrode is a thick metal wire that lies lengthwise within the plug and conducts electricity from the ignition cable hooked to one end of the plug to the electrode gap at the other end.
color of candles It turned out, in the end, pink candles burn the longest, although, it was only off by 0.1 cm. Candles burn faster the first time you light them. Then as you light them again, they burn slower. Blue is in 2nd place, white and gold/yellow are tied for 3rd and green burns the fastest. most scented candles or birthday candles burn out
Cathy's husband, Kip, had his gall bladder removed because of an illness he blames on the candles. Metal Wicks Nriagu measured the lead released from 14 brands of candles. He found that burning four metal-wick candles for two hours can result in airborne lead concentrations that pose a threat to human health.People with weak immune systems, including children and the elderly, are particularly at risk.atch out for slow-burning candles with additives. (These candles often feel greasy to the touch.) Instead, look for pure beeswax candles, which emit less pollution. For aromatherapy, put a few drops of scented oil in a defuser -- a tray made to fit on a lightbulb.