[填空题]
A ski gondola is connected to the top of a hill by a stafsk mk48( b9ueel cable of lengp s0c*or(m: dw53 f:h qn/prdzth 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. It is observed thatf(pdwh :rn0pd*5r oqcsm3z/: 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