On page 34 the text says "engineers need to think about the porosity of the materials they are planning to use." Why does pore size (the opening in a surface) matter when thinking about filters?

Reflect on what you have learned about crime, deviance, and social control. explain your thoughts on whether all patients and people in need deserve equal treatment and care.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

12 there are four phases of self-regulation: forethought, performance, self-reflection, and punishment. select the best answer from the choices provided ot of