$9\mathrm{.}36$ A thin plate $0\mathrm{.}7$ m long and $1\mathrm{.}5$ m wide is submerged and held stationary in a stream of water $($T $=10$C$)$ that has a velocity of $1\mathrm{.}5$ m$/$s$.$ What is the thickness of the boundary layer on the plate for Rex $=500,000($assume the boundary layer is still laminar$),$ and at what distance downstream of the leading edge does this Reynolds number occur? What is the shear stress on the plate on this point?