1. The speed of a wave pulse on a guitar string depends on the tension, T, in the string and the mass per unit of length, µ, of the string. Tension has SI units of kg m/s 2 and the mass per unit of length has SI units of kg/m. What combination of T and µ must the speed of the wave be proportional to? (a) p µ/T (b) T µ (c) p T/µ (d) µ/T (e) T/µ 2. A runner maintains constant acceleration after starting from rest as she runs a distance of 48.0 m. The runner’s speed at the end of the 48.0 m is 7.57 m/s. How much time did it take the runner to complete the 48.0 m distance? (a) 6.34 s (b) 0.315 s (c) 0.0789 s (d) 12.7 s (e) 3.17 s 3. The magnitude of a vector is always greater than the magnitude of each of its components