HESI Exams Quizlet Physics

Correct Answer: A

Rationale: Conduction is the transfer of heat through a material without any movement of the material itself. In contrast, convection involves the movement of fluids to transfer heat, radiation transfers heat through electromagnetic waves, and isothermalization is not a recognized mode of heat transfer. Therefore, the correct answer is A because it does not involve the movement of material or fluid to transfer heat like convection does. Convection, radiation, and isothermalization are all modes of heat transfer, making them incorrect choices.

Correct Answer: A

Rationale: To calculate the force applied to the block, we use Newton's second law: F = m * a, where F is the force, m is the mass, and a is the acceleration. Since the mass is given as 0 kg, the force applied to the block would be 0 N. This is because with no mass, no force is required to accelerate the block. Therefore, choice A (0 N) is the correct answer. Choices B and C are incorrect as they suggest non-zero forces, which is not the case given the mass of 0 kg. Choice D is also incorrect as the force can indeed be determined based on the provided information.

Correct Answer: D

Rationale: The correct answer is D. Capillarity is due to the cohesive forces between liquid molecules, leading to surface tension at the liquid-gas interface. This results in the liquid rising or falling in narrow tubes due to intermolecular forces overcoming gravity. A: Buoyancy and pressure differentials do not directly explain capillarity, which is driven by surface tension. B: Density variations and compressibility do not play a significant role in capillarity compared to surface tension. C: Viscous dissipation and inertial effects are not the primary factors influencing capillarity; it is mainly driven by intermolecular forces.

Correct Answer: D

Rationale: The primary factor responsible for generating lift on an airplane wing is the application of Bernoulli's principle to the airfoil's shape. As the air flows over the curved upper surface of the wing, it speeds up, creating lower pressure according to Bernoulli's principle. This pressure difference between the upper and lower surfaces generates lift. This phenomenon is crucial for flight and is the fundamental principle behind how wings work. A: Propulsion force generated by the engines is not directly related to lift generation but rather to providing thrust for forward motion. B: Buoyant forces acting on the entire aircraft are relevant for lighter-than-air aircraft like hot air balloons, not for airplanes. C: Drag reduction achieved through streamlining is important for reducing air resistance but not the primary factor for lift generation on a wing.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.