1 / 12 (Foto:Reuters)
2 / 12 ORANGE, TX - SEPTEMBER 03: Tiffany Quillen (L) helps to distribute relief supplies that she and a group of friends brought from North Carolina to flood victims after torrential rains pounded Southeast Texas following Hurricane and Tropical Storm Harvey causing widespread flooding on September 3, 2017 in Orange, Texas. Harvey, which made landfall north of Corpus Christi August 25, has dumped nearly 50 inches of rain in and around areas Houston. Scott Olson/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==
3 / 12 US President Donald Trump and First Lady Melania Trump board Air Force One at Ellington Field on September 2, 2017, before departing for Louisiana to continue their tour of areas affected by Hurricane Harvey. / AFP / Nicholas Kamm
4 / 12 CAR13. CARACAS (VENEZUELA), 02/09/2017.- Lilian Tintori (c), esposa del dirigente polÌtico preso Leopoldo LÛpez, llega para ofrecer una rueda de prensa hoy, s·bado 2 de septiembre de 2017, en Caracas (Venezuela). Las autoridades venezolanas prohibieron hoy a Lilian Tintori, activista y esposa del lÌder opositor privado de libertad Leopoldo LÛpez, salir del paÌs para reunirse a partir del lunes con los mandatarios de Francia, EspaÒa, Alemania y el Reino Unido. EFE/Cristian Hern·ndez
5 / 12 Journalists watch a TV debate between German Chancellor Angela Merkel of the Christian Democratic Union (CDU) and her challenger Germany's Social Democratic Party SPD candidate for chancellor Martin Schulz in Berlin, Germany, September 3, 2017. German voters will take to the polls in a general election on September 24. REUTERS/Fabrizio Bensch
6 / 12 Maria Vasquez takes a break as her husband Daniel holds their three-month-old son while taking shelter along with thousands of others at the George R. Brown convention center after Tropical Storm Harvey flooded their home in Houston, Texas, U.S. September 1, 2017. The Vasquez family, originally from El Salvador, spent six days at the shelter after being airlifted by rescue helicopter. Vasquez, a truck driver who supports a family of five, did not hold flood insurance. Picture taken September 1, 2017. REUTERS/Carlos Barria
7 / 12 Russian President Vladimir Putin visits an exhibition of the cultural heritage of China in Xiamen, China September 3, 2017. Sputnik/Mikhail Klimentyev/Kremlin via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. TPX IMAGES OF THE DAY
8 / 12 Vince Ware moves his sofas onto the sidewalk from his house which was left flooded from Tropical Storm Harvey in Houston, Texas, U.S. September 3, 2017. REUTERS/Adrees Latif
9 / 12 Japan's Prime Minister Shinzo Abe speaks to reporters after having a separate telephone call with U.S. President Donald Trump and Russian President Vladimir Putin at the Prime Minister's former official residence in Tokyo, Japan in this photo taken by Kyodo on September 3, 2017. Mandatory credit Kyodo/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. MANDATORY CREDIT. JAPAN OUT. NO COMMERCIAL OR EDITORIAL SALES IN JAPAN.
10 / 12 The La Tuna Canyon fire over Burbank, California, U.S., U.S., September 2, 2017. REUTERS/ Kyle Grillot
11 / 12 TOPSHOT - Jenna Fountain carries a bucket down Regency Drive to try to recover items from their flooded home in Port Arthur, Texas, September 1, 2017. Storm-weary residents of Houston and other Texas cities began returning home to assess flood damage from Hurricane Harvey but officials warned the danger was far from over in parts of the battered state. / AFP / [Assignment # goes here] / Emily Kask
12 / 12 U.S. President Donald Trump and first lady Melania Trump help volunteers hand out meals during a visit with flood survivors of Hurricane Harvey at a relief center in Houston, Texas, U.S., September 2, 2017. REUTERS/Kevin Lamarque
El gobierno de Kim Jong-un aseguró el domingo haber realizado una prueba con una bomba de hidrógeno, o más conocida como bomba H, en lo que sería la sexta prueba nuclear de Corea del Norte desde 2006.
¿Qué tan poderosa es? Las bombas de hidrógeno son generalmente mucho más poderosas que sus contrapartes atómicas.
La Bomba H comporta tres fases: fisión, fusión y reacción. La primera es una pequeña y preliminar Bomba Atómica de plutonio (como las arrojadas en Hiroshima y Nagasaki, unas 13.000 toneladas de TNT) que conduce a la segunda etapa: la fusión de deuterio y tritio, isótopos pesados del hidrógeno, creados por la radiactividad de la primera etapa.
En la tercera se produce la liberación de una gran cantidad de energía como consecuencia de los neutrones generados en la segunda etapa.
¿Qué tipo de bomba es más potente? La potencia de una bomba atómica se mide en miles de kilotones (un kilotón es igual a 1000 toneladas de TNT). Tiene un límite a causa de las características de la fisión.
Fuente: Agencias