
Greg S. answered 12/15/20
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Science & Math Tutoring from a Scientist (MIT SB, NU PhD)
To solve this, simply recall that the magnitude of momentum (p) is just mass times speed (p = mv). You should be able to carry it from here.
By my math, the speed is about 1.8 % the speed of 'meow' at 25 C and one standard atmosphere of pressure.