Traveller's cheques and credit cards (American Express, Visa, Mastercard) are exchanged for Vietnamese dong at the banks. Cards can be used in travel agencies, hotels, and major restaurants. US currency is exchanged for Vietnamese dong and treasury notes in banks, exchange bureaus, hotels, and jewellery shops.
Nikola Tesla designed the first hydroelectric power plant at Niagara Falls, New York which started producing electrical power in 1895. This was the beginning of the electrification of the United States and the rest of the world. Today, Teslaâs AC electricity is lighting and powering the globe.
How did Nikola Tesla discovered the TESLA coil? The Tesla coil was not a discovery. It was the work based in Tesla's mind and unleashed in the Colorado Springs laboratory. An earlier test, lasting only one second, had confiâ¦rmed that the equipment in the building, an enormous tesla coil and the tower seemed to work.