1. The problem statement, all variables and given/known data So the problem starts out like this Stick of the Gods! You hold one end of a stick, but it has no other end. It simply extends into infinity. Its one-dimensional density distribution is given by: λ=(λinitial)times(e^(-x/L)) λ is the density The problem doesn't state what x is, and maybe that is what is tripping me up, I think it refers to the distance from one end of the stick. L is the length of the stick. A) what is the mass? B) Where is the center of mass in terms of m and L? C) What is the moment of inertia about the end you are holding in terms of m and L? D) What is the moment of inertia about the center of mass in terms of m and L? 3. The attempt at a solution I think if I could figure out A) then I could figure out the rest, I am just looking for someone to point me in the right direction. I posted B-D so anyone could know more details about what the question is concerning in A. So I know what in general λ=mass/length, so do I just end up with m=Ltimesλ? I feel like that is too simple. I also know that m= the integral from (in this case) 0 to infinity of the density, but I am not sure how to integrate that because I don't know what I would be integrating with respect to, x? Is x the variable? And if I do do that, the I have an infinite value for the mass, but I am assuming that the problem wouldn't want me to find an infinite value, so I must be doing it wrong. When I integrated, I got m=-L(λinitial)e^(-x/L).