How the speed of sound changes in different medium , explain your answer with reference to the arrangement of particles in different mediums?

Which of the following substances would you expect to find in the blood, and not in the lymph? selected answers: calcium glucose calcium glucose estrogen oxygen fatty acids water answers:

Which example is a indication of stress a. becoming more alert b. narrowing air passages c. slowing down if the heartbeat d. decreasing blood sugar with adrenaline

Which word can describe a person's gender identity? a) female b) intersexual c) asexual d) androgynous