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i think many things would be lethal at mach 5

At what speed must one deliver an apple for the apple to become completely incinerated before completing its delivery?

If an apple were to be incinerated at such speeds, then would the residual air pressure and heat waves be lethal regardless?

And if such waves were considered lethal, then could we still consider the apple to be the means of lethality?

Anything is a deadly weapon if it's moving fast enough.