HESI A2 Physics Quizlet

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: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: Ketchup. Ketchup is a common example of a shear-thinning fluid because its viscosity decreases under shear stress. When force is applied to ketchup, its resistance decreases, making it easier to flow. This behavior is characteristic of shear-thinning fluids, where viscosity decreases with increasing shear rate. Water (Choice A) is a Newtonian fluid with constant viscosity, while Air (Choice C) and Alcohol (Choice D) do not exhibit shear-thinning behavior. Therefore, B is the correct choice.

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: B

Rationale: The correct answer is B: ṁ = ρvA. This equation is derived from the continuity equation, which states that mass flow rate ṁ remains constant in steady flow. Mass flow rate ṁ is the product of fluid density ρ, cross-sectional area A, and average velocity v. This relationship is crucial for understanding the behavior of fluids in pipes. Choice A is incorrect because the mass flow rate can be determined using the given equation without any additional information. Choice C is incorrect because Bernoulli's principle is not directly related to the calculation of mass flow rate. Choice D is incorrect because the equation of state for the specific fluid is not required to determine the mass flow rate using the continuity equation.