1. The problem statement, all variables and given/known data A ski gondola is connected to the top of a hill by a steel cable of length 620 m and diamter 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 the pulse to return. (a) What is the speed of the pulse (b)What is the tension in the cable? 2. Relevant equations simple velocity equation: v = d/t density equation: p = m/v speed of wave on a cord: v = √[(F)/(m/L)] 3. The attempt at a solution I was sucessful with part a of the question. It's just a simple velocity equation: v = 620/16 = 38.75 s. For the second part, I know I need to find mass, so I could plug it in the speed of wave in a cable equation. I tried to use the simple density equation since I already have information for the cross-sectional part of the cable: m = pv m= p (LA)→length times area m = ??? It seems I don't have enough information to find mass because I don't have p (density)!