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Free NLN PAX Nursing Entrance Prep PDF with 30 questions
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Q1Calculate the acceleration of a cyclist who increases their speed from 0 to 30 meters per second in 5 seconds.
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✓ Correct answer: 6 m/$$s^{2}$$
The correct answer is 6 m/$$s^{2}$$. To find the acceleration, use the formula: $$\text{acceleration} = \frac{\text{change in velocity}}{\text{time taken}}$$. The change in velocity is calculated as: 30 m/s - 0 m/s = 30 m/s. The time taken is given as 5 seconds. Thus, $$\text{acceleration} = \frac{30\text{ m/s}}{5\text{ s}} = 6\text{ m/s}^2$$.
Q2A 700-g block of ice is initially at rest on a frictionless surface. A 70-g steel ball traveling at 4 m/sec strikes the block of ice and bounces backward at 1.5 m/sec. How fast will the block of ice be moving after the collision?
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✓ Correct answer: 0.35 m/sec
Answer: 0.35 m/sec. Use the conservation of momentum equation to solve for the speed of the block of ice. $$m_1v_1 + m_2v_2 = m_1v_1' + m_2v_2'$$ Where: $$m_1$$ is the mass of the steel ball, $$v_1$$ is the initial velocity of the steel ball, $$v_2$$ is the initial velocity of the block of ice (which is 0), $$v_1'$$ is the final velocity of the steel ball, and $$v_2'$$ is the final velocity of the block of ice. $$m_1 = 70 \text{ g}, \ v_1 = 4 \text{ m/sec}, \ v_2 = 0 \text{ m/sec}, \ v_1' = -1.5 \text{ m/sec}$$ Solving for $$v_2'$$, we get: $$v_2' = \frac{(70 \text{ g} \times 4 \text{ m/sec}) + (700 \text{ g} \times 0 \text{ m/sec}) - (70 \text{ g} \times -1.5 \text{ m/sec})}{700 \text{ g}} = 0.35 \text{ m/sec}$$
Q3A chemical compound contains 20 hydrogen atoms and has a molecular mass of 34 amu. What is the molecular formula of this compound?
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✓ Correct answer: $$H_{20}$$
Answer: $$H_{20}$$ The molecular formula represents the number of atoms of each element in a molecule. Here, the compound is composed entirely of hydrogen atoms (20 atoms).
Q4Which of the stages listed below denotes the final stage of the cell cycle in eukaryotic cells?
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✓ Correct answer: Cytokinesis
Cytokinesis is the final stage of the cell cycle in eukaryotic cells. During cytokinesis, the cytoplasm of a eukaryotic cell divides to form two daughter cells, each containing one nucleus. G1 phase is the first stage in the cell cycle, where the cell grows and synthesizes proteins necessary for cell division. S phase is the part of the cell cycle in which DNA is replicated. G2 phase follows DNA replication; the cell continues to grow and prepares for mitosis.
Q5What type of tissue is primarily responsible for coordinating body movements and producing force?
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✓ Correct answer: Muscle
Answer: Muscle Muscle tissue is specialized for contraction and movement. It is responsible for generating force and facilitating movement in the body. Muscle tissue is found in skeletal muscles, the heart, and the walls of hollow organs like the intestines and blood vessels.
Q6To which bodily system do the kidneys and urinary bladder belong?
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✓ Correct answer: Urinary system
Answer: Urinary system The urinary system, also known as the renal system, is responsible for the removal of waste products and excess substances from the bloodstream. This regulation is crucial to maintaining homeostasis. The urinary system includes the kidneys, ureters, urinary bladder, and urethra.
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