The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
Why are cars designed to be capable of going much faster than the speed limit? (Don’t tell me they’re made with the Autobahn in mind.) Andy Crosby, north Wales
Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.
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