What is a double circulatory system?

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water