When mechanical waves transmit through a medium, the waves pass through the medium and continue into the next medium. This is what happens when you talk to another person on the other side of a wall. The sound is through the air, then through the wall, then through the air on the other side of the wall, until it reaches the other person’s ears. *

Which of the following is an advantage of using nuclear power plants to produce electricity?

Which of the following did the founding fathers see as a benefit of the federal structure (federalism) of government? a.) all power is concentrated in the national government. b.) the power is divided between national and state governments. c.) all the power is concentrated in the state and local governments. d.) the power is divided between the people and the government

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.