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Would you be able to stop a nuclear missile by hitting it with a liquid nitrogen missile, As a means to prevent the nuclear radiation from spreading or falling to the ground from impact?

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    $\begingroup$ Welcome to Worldbuilding, Ted! If you have a moment, please take the tour and visit the help center to learn more about the site. You may also find Worldbuilding Meta and The Sandbox useful. Here is a meta post on the culture and style of Worldbuilding.SE, just to help you understand our scope and methods, and how we do things here. Have fun! $\endgroup$ – Gryphon Jan 21 '19 at 20:38
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    $\begingroup$ I'm unsure what you mean by "a liquid nitrogen missile". Could you please clarify this? It is possible to stop a nuclear missile by hitting it with another missile, the trick is to have precise enough targeting and the ability to counter any opposing dodges so your missile can get close enough to destroy the other missile. $\endgroup$ – Gryphon Jan 21 '19 at 20:39
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    $\begingroup$ If you hit it with a rock you can stop it... Problem is hitting it is hard... $\endgroup$ – Artemijs Danilovs Jan 21 '19 at 20:39
  • $\begingroup$ Gryphon is right, you should provide more information on your situation. $\endgroup$ – Artemijs Danilovs Jan 21 '19 at 20:50
  • $\begingroup$ That small edit is nowhere near enough to justify reopening. Since a quick Google check suggests liquid nitrogen missiles are toys fueled by liquid nitrogen and not actual military missiles (correct me if I'm wrong), then you need to completely explain the nature and use of a liquid nitrogen missile. then you need to explain which nuclear missile we're shooting at, where it's coming from, where it's going to, the weather at the time of impact at the zone of impact.... As-is, this isn't answerable. $\endgroup$ – JBH Jan 22 '19 at 5:00
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Short answer: NO

Long answer: a liquid nitrogen missile is nothing more than a mass of liquid contained in a missile, impacting the incoming nuclear missile. While kinetic weapons can be used to destroy the target, it is preferable to use dense materials, in order to deliver larger amount of kinetic energy. Using liquid nitrogen for this is like using a sponge baseball bat to hit someone intruding your house.

If the goal of using liquid nitrogen is to use the cooling consequent to the evaporation of the nitrogen as a mean to embrittle the nuclear missile, it's a vane hope: evaporation of nitrogen and cooling of the mass of the missile takes time, while the impact will last, at most, few tenths of seconds.

The only effect you would achieve would be a nice puff of condensing humidity once the liquid nitrogen gets sprinkled around by the impact and start evaporating, cooling the atmosphere around it.

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    $\begingroup$ The amount of damage required to disable a nuclear warhead is amazingly small. Any sort of damage to the nose cone will cause the warhead to disintegrate due to aerodynamic stress long before it gets to detonation distance. Even a blob of LN2 (without tanks or missile structure) meeting an incoming ICBM (closing speed 8 to 16 km/sec) will do enough damage to make survival to detonation extremely unlikely. $\endgroup$ – WhatRoughBeast Jan 21 '19 at 21:54
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Yes

But you don't need to go to the trouble of filling your missile with Liquid nitrogen. Just the fact that you hit it with another missile is typically going to be enough to prevent the missile from exploding with a nuclear reaction.

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