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.
He went on to invent numerous devices and procedures that were essential to the harnessing of electricity and the development of radio. Our Living Language : The Serbian-born inventor Nikola Tesla came to America when he was 28 years old. After working briefly for Thomas Edison, Tesla set up his own laboratory and immediately launched a succession of discoveries and inventions.