A rising bubble viscometer consists of a glass vessel that is 30 cm deep. It is filled with a liquid at constant temperature having a density of 1260 kg/m3. The time necessary for a bubble
having a diameter of 1 cm and a density of 1.2 kg/m3 to rise 20 cm up the center of column of
liquid is measured as 4.5 s. Calculate the viscosity of the liquid.

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explanation:

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

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