HESI A2 Physics Quizlet

Correct Answer: A

Rationale: To calculate density, divide the mass by the volume. In this case, 24 g / 6 cm3 = 4 g/cm3. This is the correct answer (A) because density is expressed in units of mass per volume. Choice B is incorrect as it has the inverse units. Choices C and D are incorrect as they do not match the calculated value based on the given mass and volume.

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: C

Rationale: According to the zeroth law of thermodynamics, two systems are in thermal equilibrium if they have the same temperature. This is because temperature is a measure of the average kinetic energy of particles in a system, and when two systems have the same temperature, there is no net transfer of heat between them. Choice A (same pressure) and B (same volume) are not correct because pressure and volume are not sufficient indicators of thermal equilibrium. Choice D (made of the same material) is also incorrect as different materials can still be in thermal equilibrium if they have the same temperature.

Correct Answer: B

Rationale: To find the diameter of a circle, you simply multiply the radius by 2. In this case, the radius is 6 meters, so the diameter would be 6 x 2 = 12 meters. Therefore, the correct answer is B (12 m). Choice A (6 m) is the same as the given radius, not the diameter. Choices C (18 m) and D (36 m) are incorrect as they are multiples of the radius, not the diameter. The key is to remember that the diameter is always double the radius in a circle.

Correct Answer: D

Rationale: To find the resistance, we use Ohm's Law: R = V/I. Given V = 120V and I = 25A, we have R = 120V / 25A = 4.8 ohms. Therefore, choice D is correct. Choice A (96 ohms) is incorrect as it does not match the calculated value. Choice B (104 ohms) and choice C (150 ohms) are also incorrect as they do not match the correct resistance value of 4.8 ohms.