The unit circular mil is equal to the _____.

10. Select all the macromolecules that make up and maintain living organisms. A) carbohydrates B) proteins C) amino acids D) lipids E) nucleic acids F) vitamins G) nucleic acids, proteins, lipids carbohydrates

11. A researcher decides to test the scientific validity of the common phrase “An apple a day keeps the doctor away.” What would be a valid hypothesis to investigate this specific question? A) The daily consumption of a single apple does not change the number of visits to the doctor. B) Apples are high in vitamin C C) Eating apples decreases the frequency of contracting a cold. D) Those who consume apples have longer lifespans than those who do not consume apples. E) Eating one apple every day is good for you.

26. A bottle of Na in solution and a bottle of Cl in solution are mixed together and the water evaporated. What type of bond will be created between the atoms, and what will be the product? A) carbon bonds; carboxyl groups B) covalent bonds; sodium chlorine C) ionic bonds; table salt D) hydrogen bonds; sodium hydroxide

27. The addition of a strong acid like HCl to an aqueous solution would result in A) an increase in pH. B) the release of H+ into the solution. C) both the release of H+and a decrease in pH. D) both the release of H+ and an increase in pH. E) a decrease in pH.

16. Using the periodic table as your tool, identify the atomic characteristic that would most quickly and efficiently identify any single element. A) number of protons and electrons B) number of shells C) number of neutrons and electrons D) number of neutrons

Combination circuit.png In the combination circuit above, which two paths are parallel?

Combination circuit(4).jpg Refer to the diagram above and solve using the values provided. R1 = 30 Ω, R2 = 600 Ω, and R3 = 1800 Ω, and 240 V is applied between A and B. What is the voltage across R2?

Combination circuit(4).jpg R1 = 240 Ω, R2 = 300 Ω, and R3 = 1200 Ω. What is the resistance between A and B?

Simple combination circuit.png In tracing the path in the combination circuit shown here, how many separate paths can the current flow from the negative terminal to the positive terminal?