Science
posted by Adam .
I would appreciate some help if poss I am really stuck.
I have an equation t = kpxd^2
I have to find the SI units of K
SI units of t = s
p = kg^3
x = m
d = m
k is constant
I am really pulling my hair out on this one?

so use the units to give you the answer
s = k * (kg^3) * (m) * (m)
s = k * (kg^3) * (m^2)
You have to end up with seconds on the right side
so....
k has to have units to get rid of the (kg^3) and the (m^2) and you have to end in seconds
so....
to get rid of (kg^3) you need (kg^3)
to get rid of (m^2) you need (m^2)
to end up in seconds k needs to have s in it
so....
k > s(kg^3)(m^2) 
Oh! I see now, thanks very much.