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  • Seventy years ago, the nuclear bombs dropped over Hiroshima and Nagasaki

  • exploded and to this day remained the only use of nuclear weapons for warfare, but with around

  • 15,000 warheads remaining in the world

  • What happens if we have a nuclear war? The impact of a single nuclear bomb depends on many factors like the weather, weapon design,

  • geographical layout of where the bomb hits and if it explodes in the air or [on] the ground. Approximately

  • 35 percent of the energy comes in the form of thermal radiation or heat

  • since thermal radiation

  • Travels at approximately the speed of light the flash of light and the heat comes several seconds before the blast wave and this causes flash

  • Blindness to anyone looking a temporary blindness of a few minutes with a one megaton bomb which is 80 times larger than the hiroshima bomb

  • but much smaller than many modern nuclear weapons those 21 kilometers away would experience flash blindness on a clear day and

  • Even up to 85 kilometers away on a clear night

  • Thermal radiation burns happen closer to the bomb with first-degree burns occurring around 11 kilometers

  • Second-degree burns at 10 kilometers and third-degree burns destroying skin tissue at 8 kilometers third-degree burns that cover over

  • [24%] of the body will likely be fatal without quick medical care these distances are variable depending on the weather and what clothing you're wearing

  • White clothing for example can reflect some of the energy well darker clothes absorb it at its [center] the hiroshima explosion was estimated to be

  • [300,000] degrees Celsius which is over

  • 300 times hotter than the temperature bodies are cremated at this intense heat

  • Reduces a body to its basic elements the radiation from the blast also behaves like sunlight

  • So [object] cast shadows where the radiation doesn't directly hit

  • But most of the energy released in the nuclear explosion is in the blast which drives air away from the site of the explosion

  • creating a sudden change in air pressure

  • That can crush objects or knock them down [if] we use a [1] megaton bomb as an example again within a 6 kilometer radius

  • There would be an estimated

  • 180 tons of Force on the wall of Every two-story building with wind speeds of

  • 255 kilometers an hour within a 1 kilometer radius the peak pressure is four times greater and wind speeds reached

  • 756 kilometers an hour the human Body can endure this amount of pressure

  • However the winds would create fatal collisions with nearby objects

  • So deaths would largely be from collapsed buildings all this at one megaton compare that with the largest nuclear bomb ever detonated

  • the 50 megatons Tsar bomba dropped on an isolated Island in Russia, and you're looking at

  • 3333 Hiroshima bombs combined if you happen to survive all this now you have to worry about radiation

  • Now not all radiation is harmful. We're exposed to different forms of radiation every day like our phones

  • But ionizing radiation at the center of a nuclear bomb has enough energy to rip electrons from atoms

  • But the amount of radiation you encounter is greatly affected by whether you're outside?

  • or inside in a wooden structure or a cement structure and so on

  • exposure to 600 rem Radiation has a [90] [percent] chance of creating fatal illness while a dose of

  • 450 rem is estimated to create a fatal dose within half of those affected, but even those who recover still suffer long-term

  • molecular bonds and strands of Dna are broken and while most repair around a corridor don't which can result in future genetic mutations and

  • increased probability of cancer

  • Then there is the fallout

  • When a bomb is detonated on or near the surface of the Earth the blast creates a crater and the material that used to be

  • Deposited in the crater is carried up [into] the air as vaporized dirt particles forming the familiar mushroom cloud these particles become radioactive

  • And eventually condense and come back down as fallout

  • depending on wind conditions

  • Radioactive fallout can travel for hundreds of miles and though it can fall in the form of black rain for the most part you can't

  • detect fallout with your senses luckily fallout radiation

  • Decays Fairly quickly and within two weeks material will have declined to about 1% of its initial radiation level

  • But you would have to stay in a shelter

  • Until then so what is a Multi bomb Nuclear war broke out a recent study?

  • Imagined what 100 detonated warheads the approximate size of a her ocean bomb would look like if India and Pakistan went to war

  • These two nations have relatively small stockpiles of weapons

  • Compared to countries like the us Russia and China however this would still do huge damage

  • after the Nuclear Exchange 5 megatons of [Blackrock] would immediately enter the atmosphere

  • Causing global temperatures to fall and receive 9% less rain annually, [though]

  • these changes sound small they could be enough to Trigger crop failures and famine a

  • separate study estimated two billion people would starve in the wake of a

  • 100 a bomb war so what should you do we created a video called how to survive a nuclear war that looks into strategies for

  • Safety in the event of a nuclear bomb near you which you can click on here to check out

  • Don't forget to [subscribe] for more weekly science videos every Thursday and click that bell to make sure you get notifications for our videos

  • We'll see you next week

Seventy years ago, the nuclear bombs dropped over Hiroshima and Nagasaki

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核戦争になったらどうする? (What If We Have A Nuclear War?)

  • 45 3
    林宜悉 に公開 2021 年 01 月 14 日
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