[填空题]
A ski gondola is conb)kukyib), f 0;du 4w6 tpcz.1zt n2npnected to the top 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. It is observed that it took 16 s for d;wtp. 6zuc4tn 1zp n2the 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