[填空题]
A ski gondola is connected to the top of /b t fhxd8x,2ktf1x)t a hill by axuw s1hxdu(.)e:86nmxkezn8rz j8u 9 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. It61z).ekm9 ez un dx8x(:wu nx88js rhu 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