Nursing Elites

1. Which property of a wave determines its loudness in sound waves?

• A. Amplitude
• B. Wavelength
• C. Frequency
• D. Speed

Correct answer: a

Rationale: Amplitude in sound waves relates to the loudness or intensity of the sound.

2. Cherenkov radiation is a characteristic phenomenon associated with:

• A. Alpha particle emission
• B. Beta particle emission
• C. Gamma ray emission
• D. Charged particles exceeding the speed of light in a medium

Correct answer: C

Rationale: Cherenkov radiation is a phenomenon associated with charged particles exceeding the speed of light in a medium. When a charged particle travels faster than the speed of light in that medium, it emits a characteristic blue glow known as Cherenkov radiation. This occurs due to the disruption of the electromagnetic field in the medium by the high-speed particle. Options A, B, and C are not correct as they do not directly relate to the specific condition required for Cherenkov radiation to be produced. Therefore, option D, 'Charged particles exceeding the speed of light in a medium,' is the correct answer.

3. A lab report shows a potassium level of 4.5 millimoles per liter (mmol/L). Is this within the normal range of 3.5 to 5.3 mmol/L?

• A. No, it is too low.
• B. Yes, it is within the normal range.
• C. No, it is too high.
• D. Cannot be determined without additional information.

Correct answer: B

Rationale: The potassium level of 4.5 mmol/L falls within the normal range provided (3.5 to 5.3 mmol/L). 5. An infant's feeding schedule prescribes 120 milliliters of formula every 3 hours. How many ounces of formula should be prepared for a 24-hour period?

4. What mineral is essential for muscle function and nerve transmission?

• A. Calcium
• B. Iron
• C. Sodium
• D. Potassium

Correct answer: A

Rationale: The correct answer is A: Calcium. Calcium is essential for muscle function and nerve transmission. Muscles require calcium to contract properly, and nerve cells use calcium ions to transmit signals throughout the body. Without an adequate amount of calcium, muscle cramps and nerve dysfunction can occur. Iron is important for oxygen transport in the blood, sodium and potassium are electrolytes important for fluid balance and nerve function, but they are not primarily responsible for muscle function and nerve transmission like calcium.

5. A car accelerates from rest. What happens to its kinetic energy and work done on it?

• A. Both kinetic energy and work done increase
• B. Kinetic energy increases, but work done remains constant.
• C. Work done increases, but kinetic energy remains constant.
• D. Both kinetic energy and work done remain constant.

Correct answer: A

Rationale: During acceleration, the car's speed increases, leading to rising kinetic energy. Simultaneously, the force applied to accelerate the car does work on it, increasing the work done.

6. A water wave approaches a shallow beach. What happens to its speed, wavelength, and frequency?

• A. Speed increases, wavelength decreases, frequency increases.
• B. Speed decreases, wavelength decreases, frequency remains the same.
• C. Speed increases, wavelength increases, frequency decreases.
• D. Speed, wavelength, and frequency remain the same.

Correct answer: B

Rationale: As waves enter shallow water, they slow down due to increased interaction with the bottom. This causes the wavelength to decrease to maintain the constant wave energy (E = hf). Frequency remains constant as it's determined by the source, not the medium.

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