# Mathematical Constants

1. $\pi = 3.14159$
2. ${\pi ^2} = 9.8696$
3. $\sqrt \pi = 1.7724$
4. $\frac{1}{\pi } = 0.3183$
5. $e = 2.7182$
6. ${\log _{10}}\pi = 0.4971$
7. ${\log _{10}}e = 0.4343$
8. ${\log _e}10 = 2.3026$
9. Plank’s Constants = $6.624 \times {10^{ - 27}}erg.Sec$
10. Avogadro’s number = $6.023 \times {10^{23}}mole$
11. The gravitational constant = $6.670 \times {10^{ - 8}}dyne.c{m^2}/gra{m^2}$
12. $g = 32.16ft/{\sec ^2} = 980cm/{\sec ^2}$