[填空题]
A ski gondola is connec9* +np qk ;uqxtp,2z2wktr2nzted to the .fm3s97 y)jj zgzqv* btop of a hill by a steel cable of length 620 m and diameter 1.5 cm. As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable.zbq7zj.vg y s j)9fm*3 It is observed that it took 16 s for the pulse to return.
(a) What is the speed of the pulse? (Round to the nearest integer)$\approx$ m/s
(b) What is the tension in the cable? N