chemistry
t
1/2 
1/ a
n-1 . ( for n th order reaction)
maths
in differentiation ........
1) x tends to a+ f ' (x) = positive
2) x tends to a- f ' (x) = negative
for the above conditions local minimum will occour
and vice versa local maximum will occour.
physics
graphs in shm................
1) disp-accel =st line through origin
2) disp-vel = ellipse
3) velo-accel = ellipse
4) l - t*2 = st.line
5) l-t = parabola