The year, make, model and engine info needed.
Kg = N/9.81 (where 9.81 is graviatational constant for Earth - amend accordingly for situation). cm^2 = 100mm^2 Therefore, assuming problem is on Earth, you're going to be able to convert kgcm^2 to Nmm^2 by multiplying the Kgcm^2 by 10.2 (to 3 significant figures of accuracy). Therefore: 1 Kgcm^2 = 10.2 Nmm^2
1 pound of co2 = 7 cubic feet in its gaseous state
A size 5 ball under IRB rules must comply as followsLength in line 280 - 300 millimetresCircumference (end to end) 740 - 770 millimetresCircumference (in width) 580 - 620 millimetresThere are 2 other sizes for low age groups