Categorii: Tot - característiques - guerra

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La guerra de les corrents

A finales del siglo XIX, se desató una intensa rivalidad entre dos formas de distribución eléctrica: la corriente continua y la corriente alterna. Thomas Edison, con el apoyo de George Westinghouse, defendía el uso de la corriente continua, que se caracterizaba por su flujo estable en una sola dirección.

La guerra de les corrents

La guerra de les corrents

Learn more about hurricanes and tornadoes, the areas of the world they affect, how they are formed and when, and what you can do to survive such an extreme storm.

Corrent alterna

Hurricanes that have been known throughout history

Estable
Una sola direcció

Research on the emergency procedures and safety tips that can keep you safe before, during and after a hurricane.

Més segur
No gaire eficient

List several emergency procedures and safety tips that will keep you safe during a hurricane.

Més diners

List several emergency procedures and safety tips that will prepare you for a hurricane.

How do hurricanes form?

Watch the video then type in a short explanation of how the hurricanes are formed.

J.P. Morgan

The classification system for hurricanes is called The Saffir-Simpson Hurricane Wind Scale, and it's a 1 to 5 categorization of the hurricane's intensity at the indicated time.

Each category expresses the intensity in miles per hour. Example: category 1 (74-95 mph).

Type in the other 4 categories.

Nikola Tesla

Va treballar per Edison abans de començar la seva empresa.

Exemples

Which are the areas/countries of the world hit most frequently or severely by hurricanes? Choose from the options below or add your own.

ChinaPhilippinesGrand CaymanJapanAustraliaUnited StatesCaribbeanMexicoTaiwanVietnamAtlantic CoastOther
Bateria
Piles

Corrent continu

Característiques

Tornadoes that have been known throughout history

flueix de manera cíclica, fluctuant-ne la magnitud i la direcció en intervals regulars.
Conseqüències

Research on the emergency procedures and safety tips that can keep you safe before, during and after a hurricane. Type in several of them.

Menys segur
Més econòmic

List several emergency procedures and safety tips that will keep you safe during a tornado.

Més eficient

List several emergency procedures and safety tips that will prepare you for a tornado.

Patrocinador

Tornadoes are the most violent storms on Earth

Watch the video then type in a short explanation of how the tornadoes are formed.

George Westinghouse
Creada per

The classification system for tornadoes is called The Fujita Scale (or F scale), and it's an F0 to F6 categorization of the tornado's intensity.

Each category expresses the intensity in miles per hour.

Example: category F0 (40–72 mph; includes damages to trees, chimneys, and billboards).

Type in the other 5 categories.

Thomas Edison
Exemples

Tornadoes can occur almost all over the world, but US's unique geography makes it the ideal place for their development.
Type in the tornado seasons in the United States, taking into account the
Southeast and Northern Plains regions.

Endolls de cases
Línies elèctriques