HESI A2 Physics

Correct Answer: C

Rationale: Rationale: 1. A solenoid creates a magnetic field similar to a bar magnet due to its tightly wound coil structure. 2. The field lines inside a solenoid are uniform and parallel, just like a permanent bar magnet. 3. Choice A is incorrect as a straight wire has circular field lines, not parallel like in a solenoid. 4. Choice B is incorrect as a horseshoe magnet has a different field pattern, not parallel like in a solenoid. 5. Choice D is incorrect as a flat sheet conductor does not create a magnetic field similar to a solenoid.

Correct Answer: D

Rationale: To find the total voltage in a series circuit, you add the voltages of each battery. In this case, with four 5 V batteries connected in series, the total voltage would be 5 V + 5 V + 5 V + 5 V = 20 V. Therefore, the correct answer is D. Choice A (5.0 V) is incorrect because that would be the voltage of just one battery, not the total voltage of the circuit. Choice B (10.0 V) is incorrect as well since it represents the total voltage of two batteries, not four. Choice C (15.0 V) is also incorrect as it would be the total voltage of three batteries, not four.

Correct Answer: C

Rationale: The correct answer is C because in a cyclic process, the system returns to its initial state, so the net work done over the entire cycle can be positive, negative, or zero depending on the path taken. If the system undergoes a clockwise cycle on a PV diagram, work is done by the system (positive Wnet). If the cycle is counterclockwise, work is done on the system (negative Wnet). If the cycle is a closed loop, the net work done can be zero. Choices A and B are incorrect because they are too absolute and do not consider the different possibilities in a cyclic process. Choice D is incorrect because the net work done is not necessarily equal to the total heat transferred; it depends on the specific process and path taken.

Correct Answer: D

Rationale: The correct answer is D: Kinetic energy. Potential energy is the energy stored in an object due to its position or state. As the vehicle rolls downhill, potential energy decreases while kinetic energy, the energy of motion, increases. This transformation occurs as the vehicle gains speed and moves due to the force of gravity. The other choices are incorrect because thermal energy is not directly related to the motion of the vehicle in this scenario, and the transformation does not involve a combination of thermal and kinetic energy. The vehicle's movement downhill is primarily a conversion of potential energy into kinetic energy.

Correct Answer: D

Rationale: To find amperes, use the formula: Power (W) = Voltage (V) x Current (I) Given: P = 1525W, V = 110V Therefore, I = P / V = 1525W / 110V = 13.8636A ≈ 13.9 amperes (option D). Explanation: The correct answer is D because it correctly calculates the amperes drawn by the hair dryer using the power and voltage values provided. Option A is too high, B and C are too low.