HESI A2 Physics Quizlet

Correct Answer: C

Rationale: The correct answer is C: Mechanical energy. Electric motors convert electrical energy into mechanical energy through the interaction of magnetic fields, which causes the motor to rotate and perform mechanical work. This process follows the principle of electromagnetic induction, where the electrical energy is transformed into kinetic energy. Choice A (Thermal energy) is incorrect as electric motors are designed to minimize heat generation. Choice B (Light) is incorrect as electric motors do not directly produce light. Choice D (Sound waves) is incorrect as electric motors do not primarily convert electrical energy into sound waves.

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: To calculate work, we use the formula Work = Force × Distance. In this scenario, Amanda exerts a force of 100 N to push the lawnmower a total distance of 20 rows × 30 meters/row = 600 meters. Therefore, the work done is 100 N × 600 m = 60,000 N⋅m. This is why choice C, 60,000 N⋅m, is correct. Choices A and B are incorrect as they do not accurately calculate the work done. Choice D is also incorrect as we can determine the work done using the provided information.

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: 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.