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Why doesn’t a nuclear bomb create a chain reaction that destroys the entire planet?

  Because real life is not Hollywood plus 4 reasons. Fission vs. Fusion : Nuclear bombs work on the principle of nuclear fission – splitting heavy atoms like uranium or plutonium. This releases energy, sure, but to destroy the entire planet? Not enough oomph. What you'd need is a fusion reaction, the kind that fuels stars. That involves lighter atoms like hydrogen fusing, and it's way more powerful. Think of fission as a firecracker, fusion as the sun. We're nowhere near making a fusion bomb as big as our planet. The Limits of Chain Reactions : Even in a fission bomb, the chain reaction doesn't run wild forever. The explosion itself scatters the nuclear fuel, disrupting the critical mass needed to sustain the reaction. It's like trying to keep a bonfire going by throwing the logs across the field. Dissipation of Energy : The colossal energy released by a nuke mostly disperses as heat, light, and a shockwave. Earth is just way too big to absorb all that and go kabloo...
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Does "time" exist outside our Earth?

 This is a fascinating question that physicists are still grappling with. There isn't a definitive answer, but here are some key points to consider:

Time and Space are Linked: Einstein's theory of relativity showed that time and space are interconnected and form a unified concept called spacetime. This fabric of spacetime can be warped by gravity.

Time as a Dimension: We experience time as a dimension alongside the three spatial dimensions (length, width, and height). Whether this concept of time as a dimension is universal or specific to our frame of reference is still under exploration.

Time Dilation: Time isn't absolute. Einstein's theory also showed that time dilation occurs – time runs slower for objects moving at high speeds or in strong gravitational fields. This means an astronaut on a high-speed spaceship might age slower compared to someone on Earth.

Does this mean time exists outside Earth?

Scientifically: Based on our current understanding, the concept of spacetime seems to be necessary for describing the universe. So, if there were a universe without spacetime, the concept of "time" as we understand it might not even apply.

Philosophically: Time is also how we experience change and sequence of events. This perception might be inherent to our consciousness and how we interact with the world.

In essence:

Time likely exists outside Earth in the sense that some kind of mechanism dictates the order of events.

Whether this mechanism is exactly the same as our perception of time or something fundamentally different is a question that science is still exploring.


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