You are asked to assess the maximum diameter grain capable of being entrained in a particular flow. The flow is 2 m deep, the slope of the channel is 0.002, and the particles are granitic and therefore have a density of 2700 kg/m³. Use the simple expression we came up with in lecture, and that is presented in the text, employing the Shield’s parameter of q = 0.06. Please report the diameter in mm.