How do you determine the yield when a nuclear bomb goes off in your vicinity?
Of course there’s probably an app for that today.
Only problem is that the app on your phone requires electricity. What happens if the power grid is disabled and you cannot charge your phone.
How many people can use a slide rule? Or do long division, etc.
I remember that circular slide rule from going to the training as a Nuclear-Biological-Chemical (NBC) Defense Officer in Vilseck, West Germany in 1979. Kind of important even then...
That would be a great app. Some bright programmer is gonna make a mint on that. It would be cool to display using google map with colors to indicate severity of blast and fallout.