Q1. A tuning fork is struck and the following waveform drawn out on an oscilloscope:



If each horizontal division on the scale of the oscilloscope represents 0.0005 seconds. What is the frequency of the tuning fork?


Q2. There are two main types of internet "broadband" service, wired and wireless. The wireless or "WiFi" option uses electromagnetic radiation with a frequency of either 2400 MHz or 5000 MHz. Calculate the wavelength of the EM emissions in both cases, given the speed of the wave as 3 x 108 m/s.


Q3. A musician plays a note of wavelength 25 cm on his synthesiser. He knows the speed of sound is 340 m/s in air. What is the note's frequency? 


Q4. A student drops a stone into a large pond, she then counts 5 waves on the pond in 10 s. The distance between them is 80 cm. What is their speed? 


Q5. On the back of a microwave oven is a label which reads "frequency = 2,450 MHz". The speed of microwaves is 3.00×108 m/s. What wavelength are they? 



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