*해설

<문제 해설>
r1=공기=s1*rw
r2=수은=s2*rw
h2=0.03m
s=r1/r2

p=r1*h1=r2*h2
-> h1=334.426m

v=root(2*9.81*334.426)=81m/s

γa = 비중a x γw = 0.00122 x 9800[N/m3]
γh = 비중h x γw = 13.6 x 9800[N/m3]

높이h = 0.03[m] = P / γh = P / (13.6 x 9800[N/m3])
P = 0.03[m] x (13.6 x 9800[N/m3]) = 3998.4[N/m2]

높이a = P / γa = 3998.4[N/m2] / (0.00122 x 9800[N/m3]) = 334.4262295[m]

속도a = √(2g x 높이a) = 80.98621619[m/s]