Nursing Elites

1. What is the acceleration due to gravity near the Earth's surface?

• A. 9.8 meters per second squared (m/s²)
• B. 6.3 meters per second squared (m/s²)
• C. 5.0 meters per second squared (m/s²)
• D. 12.5 meters per second squared (m/s²)

Correct answer: a

Rationale: The acceleration due to gravity near the Earth's surface is approximately 9.8 m/s²

2. A scientist observes a new species of plant with unusual leaves. They hypothesize that the leaves help capture more sunlight. Which observation would LEAST support this hypothesis?

• A. The plant grows in shady environments.
• B. The leaves have a large surface area.
• C. The leaves contain high levels of chlorophyll.
• D. The plant has shallow roots.

Correct answer: A

Rationale: If the plant thrives in shade, it suggests the leaves may have adapted for other purposes than maximizing sunlight capture.

3. Dietary fiber, although not fully digested by the body, plays a crucial role in digestion. What is one of the main benefits of consuming sufficient dietary fiber?

• A. Provides a concentrated source of energy
• B. Aids in the absorption of vitamins and minerals
• C. Promotes satiety and gut health
• D. Breaks down complex carbohydrates

Correct answer: C

Rationale: Consuming sufficient dietary fiber promotes satiety and gut health. Fiber adds bulk to the diet, which helps you feel full and satisfied after meals, reducing overeating. Additionally, fiber helps regulate bowel movements by promoting healthy digestion and preventing constipation. It also feeds beneficial gut bacteria, supporting a healthy gut microbiome. While fiber does not provide energy like carbohydrates, it is essential for overall digestive health and can help prevent various chronic diseases.

4. A rocket engine expels hot gases backwards. What principle explains the rocket's forward motion?

• A. Newton's first law of motion
• B. Newton's second law of motion
• C. Newton's third law of motion
• D. Law of conservation of energy

Correct answer: C

Rationale: The hot gases expelled backwards exert a force on the rocket in the opposite direction (forward), propelling it upwards according to the action-reaction principle.

5. A ball is rolling across the floor and comes to a stop on its own. What force caused the ball to stop?

• A. Gravitational force
• B. Normal force from the floor
• C. Air resistance
• D. None of the above

Correct answer: C

Rationale: In the absence of other forces, air resistance will gradually slow down the ball until it stops.

6. The ability of optical fibers to transmit light signals around bends is primarily due to:

• A. Reflection
• B. Refraction
• C. Diffraction
• D. Polarization

Correct answer: B

Rationale: The correct answer is B: Refraction. Optical fibers transmit light signals around bends primarily through the process of refraction. Refraction occurs when light passes from one medium to another, causing it to change direction. In optical fibers, the core material has a higher refractive index than the cladding, which causes light to be reflected internally along the fiber. This phenomenon allows light signals to travel through the fiber even around bends without significant loss. Reflection (Option A) involves light bouncing off a surface, which is not the main mechanism in optical fibers. Diffraction (Option C) refers to the bending of light waves around obstacles and is not the main reason for light transmission in optical fibers. Polarization (Option D) relates to the orientation of light waves, which is not the primary factor enabling light transmission around bends in optical fibers.

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