This question is about waves.
Describe an investigation to measure the speed of sound waves in air using a signal generator, a loudspeaker, two microphones, and an oscilloscope. You may draw a diagram to help your answer.
The speed of sound in air changes when the air 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 the graph to find the speed of sound 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 a transmitter to send sound waves of a constant frequency upwards through the atmosphere. The temperature of the air decreases with increasing altitude. Explain how this decrease in temperature affects the wavelength of the sound waves.
