Scales, couplings revisited and low-energy phenomenology in M-theory on S-1/Z(2)

We reconsider the dimension-11 Planck scale, the physical scale of the elev enth dimension, the physical scale of the Calabi-Yau manifold and the coupl ing in the hidden sector in M-theory on S-1/Z(2). Also we discuss reasonabl e bounds on them. Considering the F-term of the dilaton and moduli SUSY bre aking and choosing two representative points which correspond to the scalar quasi-massless scenario and the dilaton dominant SUSY breaking scenario; r espectively, we analyze experimental constraints on the parameter space. Th e sparticle spectrum and some phenomenological predictions are also given.