( 400.9 m^4 s^-3 ) / ( 5 m s^-1 x 0.0007 s^-2 )1/3 = 48.6 m
[(m^4 s^-3)/(m s^-1 s^-2)]^1/3 cancel the m [(m^3 s^-3)/(s^-1 s^-2)]^1/3 combine s^-1 and s^-2 [(m^3 s^-3)/(s^-3)]^1/3 cancel the s^-3 [(m^3)]^1/3 cube root of m^3 is m
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