UPTET Paper 2 Math and Science 2018 Solved Paper

Concept:The speed of sound depends on the medium’s elasticity and density. It is highest in solids because they have a large bulk modulus and are less compressible. In general, speed increases from gases to liquids to solids.Explanation:Sound travels faster in solids than in liquids and gases. The bulk modulus of solids is much higher, making them less compressible. The formula $v = \sqrt{\frac{\gamma P}{\rho}}$ shows that speed is proportional to the square root of pressure over density, but the key factor is bulk modulus.From the table, the speed of sound in steel (5941 m/s) is much greater than in water (≈1402 m/s) and air (≈343 m/s). Sound cannot travel through a vacuum because there are no particles. Thus, among the given options, steel has the maximum speed of sound.Answer:D. steel