Nursing Elites

1. Which type of nuclear reaction releases a large amount of energy in a short time?

• A. Radioactivity
• B. Nuclear fission
• C. Nuclear fusion
• D. All of the above

Correct answer: C

Rationale: Nuclear fusion releases a large amount of energy in a short time by combining two light atomic nuclei to form a heavier nucleus. This process is the energy source of the sun and hydrogen bombs. Radioactivity involves the spontaneous emission of particles or energy from an unstable atomic nucleus, while nuclear fission is the splitting of a heavy atomic nucleus into two or more lighter nuclei, also releasing energy. While all the options are types of nuclear reactions, nuclear fusion is specifically known for releasing a large amount of energy rapidly, making it the correct choice in this context. Choices A and B are incorrect as they do not specifically describe the process of releasing a large amount of energy in a short time. Choice D is incorrect because not all the options listed release a large amount of energy in a short time, making it an inaccurate answer.

2. What is the function of the underlined phrase 'with a mischievous grin' in the sentence 'He approached her with a mischievous grin, his eyes twinkling'?

• A. Subject
• B. Direct object
• C. Adverbial phrase
• D. Appositive phrase

Correct answer: C

Rationale: The underlined phrase 'with a mischievous grin' functions as an adverbial phrase in the sentence. It modifies the verb 'approached' by providing information on how he approached her, describing his manner. Adverbial phrases typically answer questions like 'how,' 'when,' 'where,' 'why,' or 'to what extent,' which this phrase does by indicating the manner in which he approached. Choices A, B, and D are incorrect. The phrase does not serve as a subject (A), direct object (B), or appositive phrase (D) in the sentence. Instead, it functions to provide additional information about the action of approaching, making it an adverbial phrase.

3. What is the balanced chemical equation for the reaction between sodium and chlorine to form sodium chloride?

• A. Na + Cl2 -> NaCl
• B. 2Na + Cl2 -> 2NaCl
• C. Na2 + Cl -> 2NaCl
• D. Na + 2Cl -> NaCl2

Correct answer: B

Rationale: In a balanced chemical equation, the number of atoms of each element must be the same on both sides of the equation. When sodium (Na) reacts with chlorine (Cl2) to form sodium chloride (NaCl), we need to ensure the equation is balanced. There are 2 chlorine atoms in Cl2; hence, we need 2 sodium atoms on the left side to balance it. Therefore, the balanced chemical equation is 2Na + Cl2 -> 2NaCl. Choice A is incorrect because it does not have the correct coefficients to balance the equation. Choice C is incorrect as it incorrectly represents the formula of sodium. Choice D is incorrect as it forms NaCl2, which is not the correct compound formed in this reaction.

4. What is the product of the complete combustion of propane (C3H8)?

• A. CO2
• B. CO
• C. CH4
• D. C

Correct answer: A

Rationale: The complete combustion of propane (C3H8) results in the production of carbon dioxide (CO2) and water. When a hydrocarbon such as propane undergoes complete combustion, the carbon atoms combine with oxygen to form CO2. This makes choice A, CO2, the correct answer. Choices B, C, and D are incorrect as CO is carbon monoxide, CH4 is methane, and C is elemental carbon, none of which are the primary product of the complete combustion of propane.

5. Cassidy's track and field experience was greater than any in her school's history. Cassidy was quite tall at 5'10". This made hurdling easier, which is where she got her start. It was easy to spot Cassidy with her long ponytail.

• A. Cassidy's track and field experience was greater than any in her school's history.
• B. Cassidy was quite tall at 5'10".
• C. This made hurdling easier, which is where she got her start.
• D. It was easy to spot Cassidy with her long ponytail.

Correct answer: D

Rationale: The detail about Cassidy's ponytail is irrelevant to her track and field experience and can be removed. Choices A, B, and C provide relevant information about Cassidy's track and field experience and how her height contributed to her hurdling skills. However, choice D is the correct answer as it highlights an unrelated detail about her appearance, which does not impact her athletic abilities or achievements in track and field.

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