This question is about waves.
Describe an investigation to measure the speed of sound waves in air using two microphones and an electronic timer (or oscilloscope). You may draw a diagram to help your answer.
The speed of sound in air changes when the temperature changes. A student investigates how the speed of sound in air varies with temperature. The student's results are shown on the graph.
Draw a line of best fit on the graph.
Use your line of best fit to find the speed of sound in air when the temperature is 50 ∘C50\text{ }^{\circ}\text{C}50 ∘C.
speed of sound=—————————— m/s \text{speed of sound} = \text{—————————— m/s} speed of sound=—————————— m/sA meteorologist uses an acoustic transmitter to send sound waves of a constant frequency through the atmosphere. As the sound waves travel upwards, they pass through a layer of air at a significantly higher temperature. Explain how this increase in temperature affects the wavelength of these sound waves.
