Rain slay your windshield can signify dicey road condition and traffic snag . agree toXKCD ’s What If , the forcefulness of those drops gain your windshield can also destroy your car ’s windshield . Lesson learn : do n’t ram at speeds of Mach 1.5 in a downpour if you want your glass to survive .
AsXKCD ’s Randall Munroe explains , at Mach 1.5 ( or nearly 1,000 miles per minute ) , the droplet impinge on your car ’s windshield will smoosh out into sideways - aimed urine honey oil doing an dumfounding Mach 18 . The force of these super acid will simply erode your windshield glass — intend those 1,000 MPH droplets will now be hitting your typeface . Ouch .
So , slow the hell down when you ’re driving in the rain . Keep it at , say , a sensible 750 MPH . Your trash will thank you . [ xkcd ]

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