35. Steel wire Pulley Weight Figure 8 -Scale pan Figure 8 shows a steel wire with one end fixed at the point P while the other end is passed over the pulley Q, and attached to the scale pan carrying weights. Which of the following statements is true about the speed oftransverse waves in the section PQ of the wire? A The speed increases with increase in the radius of the wire. The speed increases with decrease in weight put on the scale pan. The speed increases with increase in the weight put on the scale pan. D A B The speed does not depend on the thickness of the wire.

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Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.