How powerful is the nuclear bomb?

The unit to measure the power of nuclear weapons is "equivalent". The capacity released by a nuclear explosion is equivalent to the energy released by the explosion of many tons of TNT explosives. Among the mainstream nuclear bombs, the 10,000-ton class is quite common, and the super warhead can even reach 10 million tons or even 100 million tons. The destructiveness caused by a nuclear explosion depends not only on the equivalent of a nuclear bomb, but also on the nature of the nuclear bomb, the number of warheads, the explosion height, and even on weather factors such as wind, wind direction, sunny and rainy days.

Take Hiroshima as an example. 1August 6, 945, the American air force B-29 super fortress bomber "Ainola? Someone threw a nuclear weapon at Hiroshima. All the buildings in the city center 12 square kilometers were destroyed, and the house destruction rate in the city exceeded 70%. According to Japanese official statistics, the number of dead and missing people reached 7 1379, and the number of injured people was nearly 654.38+10,000.

Equivalent to "little boy" 1.3- 1.6 million tons. If thrown into Beijing, the hardest hit area is basically within the Second Ring Road. Is the following effect, you can throw a nuclear bomb at any point on Google Maps, and then the explosion effect will be displayed on the map):

All objects with a center radius of 0. 1 km are directly cremated; The circle with a red radius of 0.7 km is the shock wave range, and the survival rate is basically 0; Then the radius of green area is 1.4 km, the mortality rate is 50%-90%, and persistent death will occur within hours and weeks; Then, within the radius of gray area 1.85 km, most buildings will collapse, causing countless casualties; In a circle with a maximum radius of 2. 14 km, exposed people will burn their skin for the third time due to the strong light radiation of nuclear bombs, and at the same time cause a large number of fires.