Question 1 of 3 Which factor primarily determines the speed of mechanical wave in a medium? A Amplitude B Elasticity and inertia of medium C Frequency D Wavelength 💡 Explanation The speed of a mechanical wave depends on the medium's elastic (restoring force) and inertial (mass/density) properties, not on wave characteristics like amplitude, frequency, or wavelength, which are set by the source. Question 2 of 3 In which of the following medium, the velocity of sound is highest? A Vacuum B Water C Hydrogen D Steel 💡 Explanation Sound travels fastest in solids because their tightly packed particles and greater elasticity allow vibrations to transmit more quickly than in liquids or gases; steel's high rigidity gives it the highest sound velocity among these options, while sound cannot travel through a vacuum at all. Question 3 of 3 If the speed of sound in air at 20°C is 344 m/s, the change in speed for 1°C change in air temperature is A 0.273 m/s B 0.425 m/s C 0.587 m/s D 0.873 m/s 💡 Explanation Using [latex]\dfrac{dv}{dT} = \dfrac{v}{2T}[/latex] with [latex]T = 273 + 20 = 293\text{ K}[/latex], [latex]\dfrac{dv}{dT} = \dfrac{344}{2 \times 293} = 0.587\text{ m/s per °C}[/latex]. ← Prev Check Next → Finish & See Score 0 of 3 checked ← Back 1 / 3 1 2 3
