Do you believe that string theory is a reasonable explanation for how the universe works and why or why not? Thanks:)

How do I put new string in string Trimer. Bump Type kevant

I purchased a Troy Bilt string trimmer that came with dual (fused twin .105) string cord. No one stocks dual fused cord, even the place I bought it which was Lowe's, Also very few even have .105 single cord. Where can I get some?

Can someone explain the differences between the bohr and the modern atomic theories in the description of the electron Thanks :p