HESI A2 Physics Quizlet

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: A

Rationale: In a parallel circuit, the correct answer is A: current. This is because in a parallel circuit, the current has multiple paths to flow through, and according to Kirchhoff's current law, the total current entering a junction is equal to the total current leaving the junction. Therefore, the current through each component in a parallel circuit is the same. Explanation for incorrect choices: B: Voltage - In a parallel circuit, voltage across each component remains the same but current varies. C: Resistance - In a parallel circuit, each component has its own resistance, leading to different currents flowing through each component. D: Wattage - Wattage is the product of voltage and current, and in a parallel circuit, both voltage and current can vary for different components.

Correct Answer: D

Rationale: The correct answer is D. Displacement is the shortest distance between the initial and final points of the walk. Since Jon walks around a rectangular park, his start and end points are the same, hence the displacement is 0 km. The distance traveled is the actual path length covered, which is equal to the perimeter of the rectangle (2+2+1+1=6 km). Therefore, the correct statement is that the displacement of his walk is 0 kilometers, and the distance traveled is 6 kilometers. Summary: A: Incorrect. Displacement cannot be greater than the distance traveled when walking in a closed loop. B: Incorrect. Displacement should be 0 km for a closed loop walk. C: Incorrect. Displacement cannot be greater than the total perimeter of the walk.

Correct Answer: B

Rationale: The Reynolds number (Re) is used to characterize the flow regime of a fluid, determining if it is laminar or turbulent. It is calculated as the ratio of inertial forces to viscous forces. For low Re, flow is laminar, while for high Re, flow is turbulent. Surface tension (C) and buoyancy force (D) do not directly relate to Re. Fluid density (A) affects the Reynolds number indirectly through viscosity.

Correct Answer: C

Rationale: To calculate current, we use the formula I = P/V, where P is power in watts and V is voltage in volts. In this case, the power is 780 watts and the voltage is 120 volts. Therefore, I = 780/120 = 6.5 amperes. Choice C is correct. Choice A (660 amperes) is incorrect as it is an unrealistic and excessively high value for current in this scenario. Choice B (150 amperes) is incorrect as it does not align with the calculated value using the formula. Choice D (0.15 amperes) is incorrect as it is the decimal form of the correct answer but not expressed in amperes.