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A standing wave is formed when two waves travelling in oposite directions interfere with each other.  The waves will be exactly one half wavelength out of phase, and this phase difference allows them to i...

For this, we need to use the equation F = 1/T (where F = frequncy, and T = period).  The period of this wave is the time taken for one whole wave to pass i.e. from one wave crest to the next wave crest.  ...

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/...

Resistivity is the measure of a materials resistance per unit area

We first need to remember that stress is force over area. We can calculate the area using the diameter as the specimen is told to be cylindrical (circular cross-section). The area can be calculated using ...