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Do you think the diameter of the pipe has an effect on the resonance? Why or why not? What is the pH of 50 ml of 0.1M Na2CO3 solution + 100 ml of 0.2MHCl? An object have a volume of 400 cm3 and is made from a material that has a weight density of 4,000 N/m3. What is the mass of the object? Given a sample size of 36, how large does the population standard deviation have to be in order for the standard error to be 1? Can someone help with the algebra question?