(a)[4]
Describe an experiment that can be used to determine the speed of sound in air. State the apparatus needed, the measurements made and how to calculate the speed of sound in air from those measurements. A labelled diagram may be included in your response.
(b(i))[1]
State the name of the section of the electromagnetic spectrum that Bluetooth uses.
(b(ii))[1]
State the speed at which electromagnetic waves travel in air.
(b(iii))[3]
Calculate the wavelength of the waves in the Bluetooth network.