Nursing Elites

1. Which property of a substance refers to its ability to be hammered or pressed into thin sheets without breaking?

• A. Malleability
• B. Ductility
• C. Viscosity
• D. Conductivity

Correct answer: a

Rationale: Malleability is the property that describes a substance's ability to be hammered or pressed into thin sheets without breaking.

2. What is the phenomenon responsible for the mirage effect seen in deserts?

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

Correct answer: B

Rationale: Mirages occur due to the refraction of light by layers of air with different temperatures and densities, bending the light rays and creating the illusion of water on the horizon.

3. Which form of energy is associated with the motion of an object?

• A. Kinetic energy
• B. Potential energy
• C. Thermal energy
• D. Electrical energy

Correct answer: a

Rationale: Kinetic energy is the energy of motion possessed by an object.

4. What property of a wave determines its pitch in sound waves?

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

Correct answer: B

Rationale: The pitch of a sound wave is determined by its frequency. Frequency refers to the number of cycles of a wave that occur in a given time period. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Amplitude refers to the intensity or loudness of a sound wave, wavelength is the distance between two consecutive points in a wave, and speed is the rate at which a wave travels through a medium.

5. How is power related to time?

• A. Power is inversely proportional to time
• B. Power is directly proportional to time
• C. Power is unrelated to time
• D. Power is the product of time and work

Correct answer: c

Rationale: Power is the rate at which work is done or energy is transferred, and it is not directly linked to time.

6. Which structure connects the two hemispheres of the brain, allowing communication and coordination between them?

• A. Corpus callosum
• B. Thalamus
• C. Hypothalamus
• D. Medulla oblongata

Correct answer: a

Rationale: The correct answer is A: Corpus callosum. The corpus callosum is a broad band of nerve fibers that connects the left and right hemispheres of the brain, allowing them to communicate and coordinate with each other. It enables the transfer of information between the two hemispheres, which is essential for various functions such as sensory processing, motor coordination, and cognitive processes. The thalamus (B) is a different brain structure responsible for relaying sensory signals to the cerebral cortex, while the hypothalamus (C) regulates various vital functions such as body temperature, hunger, and hormone release. The medulla oblongata (D) is located in the brainstem and controls vital autonomic functions like breathing and heart rate. Therefore, the corpus callosum is the correct answer as it directly connects the two hemispheres of the brain for communication and coordination.

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