HESI A2 Physics Quizlet

Correct Answer: C

Rationale: The correct answer is C: Boundary layer effect. The boundary layer is the thin layer of fluid that adheres to a solid surface in fluid flow. This occurs due to viscosity, which causes the fluid particles to stick to the surface. This layer affects the overall flow behavior and drag force on the object. Buoyancy (A) is the upward force exerted on an object submerged in a fluid. Bernoulli's principle (B) relates to the conservation of energy in fluid flow. Surface tension minimization (D) pertains to minimizing the surface area of a liquid to reduce its surface tension, not relevant to the adherence of fluid to a solid surface in flow.

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: B

Rationale: The correct answer is B: Decreases. When light travels from air into a denser medium like glass, it slows down due to the higher refractive index of the denser medium. This change in speed causes the light to bend or refract towards the normal line, demonstrating the phenomenon of refraction. The other choices are incorrect because light does not speed up when entering a denser medium (choice A), its speed is not constant (choice C), and it does not become unpredictable (choice D) - it follows the laws of physics governing refraction.

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: Failed to generate a rationale after 5 retries.