What is bias? Why is it a problem with the scientific method?

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

What factors contribute to the effect an environmental toxin has on the human body?

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.