Nursing Elites

1. What phenomenon occurs when two identical waves are perfectly aligned and reinforce each other?

• A. Refraction
• B. Reflection
• C. Diffraction
• D. Constructive interference

Correct answer: D

Rationale: Constructive interference occurs when two identical waves are perfectly aligned and reinforce each other. This results in an increase in the overall amplitude of the wave. Refraction refers to the bending of waves as they pass from one medium to another, reflection is the bouncing back of waves when they encounter a boundary, and diffraction is the bending of waves around obstacles and openings. In this scenario, the waves are not changing direction or bending but rather combining to produce a wave with a larger amplitude, which is characteristic of constructive interference.

2. What breaks down into glucose to provide energy?

• A. Lipids
• B. Proteins
• C. Carbohydrates
• D. Nucleic acids

Correct answer: C

Rationale: Carbohydrates are broken down into glucose during digestion, providing energy for cellular processes through glycolysis and cellular respiration. Glucose is a primary source of energy for cells, and its breakdown is essential for powering various cellular activities. Lipids are broken down into fatty acids and glycerol, not glucose. Proteins are broken down into amino acids and are not a direct source of glucose. Nucleic acids are not broken down into glucose for energy production.

3. What kind of error is present in the following sentence? "The project requires researching, writing a report, and presenting findings."

• A. Parallelism
• B. Sentence fragment
• C. Misplaced modifier
• D. Subject-verb agreement

Correct answer: A

Rationale: The correct answer is A: Parallelism. The sentence contains a parallelism error in the list of actions required for the project. In a series or list, all elements should be in the same grammatical form. In this sentence, 'researching' and 'writing' are in gerund form, but 'presenting' is in infinitive form. To ensure parallel structure, all items in the list should be in the same form. Therefore, the corrected version should read, "The project requires researching, writing a report, and presenting findings." Choices B, C, and D are incorrect. There are no sentence fragments, misplaced modifiers, or subject-verb agreement errors in the original sentence.

4. What is the main idea of the paragraph?

• A. Coal mining is a dangerous job.
• B. Coal mining is a dirty job.
• C. Coal mining takes place underground.
• D. Coal miners risk injury on a daily basis.

Correct answer: A

Rationale: The main idea of the paragraph is to highlight the dangers associated with coal mining. The sentence 'Coal miners risk injury and health issues on a daily basis' supports the concept that coal mining is a dangerous job. Choice B is incorrect as it focuses on cleanliness rather than safety. Choice C is incorrect as the location of coal mining is not the primary focus of the paragraph. Choice D is incorrect as it does not encompass the full extent of risks mentioned in the paragraph.

5. Apply the polynomial identity to rewrite (a + b)².

• A. a² + b²
• B. 2ab
• C. a² + 2ab + b²
• D. a² - 2ab + b²

Correct answer: C

Rationale: When you see something like (a + b)², it means you're multiplying (a + b) by itself: (a + b)² = (a + b) × (a + b) To expand this, we use the distributive property (which says you multiply each term in the first bracket by each term in the second bracket): Multiply the first term in the first bracket (a) by both terms in the second bracket: a × a = a² a × b = ab Multiply the second term in the first bracket (b) by both terms in the second bracket: b × a = ab b × b = b² Now, add up all the results from the multiplication: a² + ab + ab + b² Since ab + ab is the same as 2ab, we can simplify it to: a² + 2ab + b² So, (a + b)² = a² + 2ab + b². This is known as a basic polynomial identity, and it shows that when you square a binomial (a two-term expression like a + b), you get three terms: the square of the first term (a²), twice the product of the two terms (2ab), and the square of the second term (b²). Therefore, the correct answer is C (a² + 2ab + b²)

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