HESI A2 Physics Quizlet

Correct Answer: B

Rationale: The correct answer is B, the highest peak. At the highest peak, the car has the greatest height above the ground, resulting in the greatest potential energy due to gravity. Potential energy is directly proportional to the height of an object above the reference point. As the car descends from the peak, potential energy is converted to kinetic energy. Choices A, C, and D are incorrect because potential energy is not solely determined by the start or end of the ride, nor the lowest point on the roller coaster.

Correct Answer: A

Rationale: The correct answer is A because a refrigerator operates on a Carnot cycle, which involves removing heat from a cold reservoir at a lower temperature. This aligns with the basic principle of how refrigerators work, by transferring heat from inside the refrigerator to the outside environment. Choice B is incorrect because refrigerators do not create cold; they simply transfer heat. Choice C is incorrect because refrigerators actually decrease the total entropy in the system by cooling the inside of the refrigerator. Choice D is incorrect as refrigerators do not operate isothermally at both the hot and cold reservoirs; there is a temperature difference between the two reservoirs to allow for heat transfer.

Correct Answer: B

Rationale: Rationale: Viscosity is the resistance of a fluid to flow. It determines how easily a fluid can flow and is crucial in various applications like fluid dynamics. In contrast, inertia (choice A) is related to the mass of an object, not a property of a fluid. Compressibility (choice C) refers to the change in volume of a fluid under pressure, not its resistance to flow. Buoyancy generation (choice D) is related to the upward force exerted on an object immersed in a fluid, not a property of the fluid itself. Therefore, the correct answer is B as it directly relates to the definition and significance of viscosity.

Correct Answer: C

Rationale: The correct answer is C because frequency is the number of cycles per unit time. In this case, the wave has a frequency of 60 hertz, which means it completes 60 cycles per second. Choice A is incorrect because one cycle per minute would correspond to a frequency of 1 hertz. Choice B is incorrect because the frequency does not determine the distance from crest to crest. Choice D is incorrect because the distance from crest to trough is not determined by frequency. Thus, the correct answer is C based on the definition of frequency.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.