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Firstly the values should be converted into more comfortable units. 0.42km/s = 420m/s, and 16kHz = 16,000Hz. Next, use the equation wavelength = speed/frequency This gives wavelength = 420m/s over 16,000/...
The first part of the question, calculating the acceleration, uses the fact that acceleration equals the change in velocity divided by the time. In this case, the change in velocity is 20-0 and the time i...
A see-saw represents a pivot, for the see-saw to balance the moment on the left hand side has to equal the moment on the right hand side. Moment = Force * distance Therefore the moment of the right hand ...
There are two types of wave: longitudinal and transverse. It's really important to learn their properties as this is a very common question. The main thing to remember is longitudinal waves have oscillati...
Figure 1 (AQA GCSE Science A Physics: Higher Tier):
The wind turbine costs £50 000 to buy and install.
The hydroelectric generator costs £20 000 to buy and install.
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