1. A wave on a vibrating string travels at a speed of 250ms -1 . Calculate the wavelength of a note sounding at 420Hz. 2

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1. A wave on a vibrating string travels at a speed of 250ms -1 .
Calculate the wavelength of a note sounding at 420Hz.
2. A gardener is exposed to hand-arm vibration at a level of 1.5
ms-2 for 1 hour and 0.55 ms-2 for 2 hours per day. Calculate their
daily exposure to vibration, A(8) m-2 . How would you determine if
this was an acceptable risk?
3. List four pieces of information regarding the properties of
moist air that one can read from a psychrometric chart.