Your answer is correct. The decisive factors for the settling velocity of the solids are the flow characteristics in the channel (i.e. the turbulence, viscosity and density of water), and the characteristics of the solids (i.e. particle size, particle shape and density).

Your answer is partially correct. The decisive factors for the settling velocity of the solids are the flow characteristics in the channel (i.e. the turbulence, viscosity and density of water), and the characteristics of the solids (i.e. particle size, particle shape and density).

Unfortunately, your answer is not correct. The decisive factors for the settling velocity of the solids are the flow characteristics in the channel (i.e. the turbulence, viscosity and density of water), and the characteristics of the solids (i.e. particle size, particle shape and density).

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