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# Physics help, simple harmonic oscillators watch

1. A U-tube manometer is half-filled with water. The liquid levels are displaced so that one side is higher than the other. The water is then left free to oscillate from side to side. The tube has a cross section area of 1cm2 and the initial displacement is 0.1 m from the rest position, which is 0.5 m above the middle of the bottom of the tube. The total length of tube filled with water is 1.1 m.
g = 10 N kg–1

Using the relationship: pressure = density x g x depth, calculate the pressure at the bottom of the tube due to each of the unbalanced columns of water .

I dont know how to do this. Please help. The main bit i dont understand is, how they got 1000 for the value of density.
2. H3n
RDKGames
3. The density of water is 1000 kg/m^3.
4. oh snap, I felt really dumb that I couldn't work out density. TY didt know it was 1000kgm-3

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Updated: October 29, 2017
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