This path is lower in resistance than the surrounding air and charge flows through this channel, creating lightning. Electricity is the flow of charge. The current is the amount of charge that flows through a cross-sectional area in one second. Voltage is the work done per charge. The voltage of lightning varies with certain altitudes and thickness of the bolt. These fluctuating values are caused by the fact that the cloud and earth act as capacitors.
Avoid placing two Forever Stamps on a mail piece for heavier mail. Additional ounces are much cheaper costing only $0.22 per additional ounce rather than $0.49 for one ounce letter.If you add two Forever Stamps to a 2 ounce letter, you would be paying $0.98 for an item that should only cost $0.71.n 2014, the rate increased to $0.49. Customers who purchased Forever Stamps in 2013 at the rate of $0.46 each may still use those stamps to mail their First Class letters today without adding additional postage to the envelope.
ForeverÂ® stamps can always be used for First-ClassÂ® Mail up to one ounce, regardless of the current one-ounce rate. Shop Now