HESI A2 Physics Quizlet

Correct Answer: C

Rationale: The correct answer is C because according to the Law of Universal Gravitation, the gravitational force between two objects is directly proportional to the product of their masses. This means that as the masses of the objects increase, the gravitational force between them also increases proportionally. The other choices are incorrect because: A: the gravitational constant is a constant value that appears in the equation but is not what the force is directly proportional to. B: the distance between the objects affects the gravitational force, but it is inversely proportional to the square of the distance, not directly proportional. D: the square of the distance between them also plays a role in the gravitational force, but it is not what the force is directly proportional to.

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: B

Rationale: The correct answer is B: Momentum. Momentum is not considered a fundamental energy type because it is a property of moving objects, not a form of energy itself. Thermal energy (A), sound energy (C), and chemical energy (D) are all fundamental energy types as they represent different forms of energy that can be converted into other forms. Thermal energy is the internal energy of an object due to its temperature, sound energy is caused by vibrations in a medium, and chemical energy is stored in the bonds of chemical compounds. Momentum, on the other hand, is a measure of an object's mass and velocity, not a distinct form of energy.

Correct Answer: C

Rationale: The correct answer is C: Mechanical energy. Electric motors convert electrical energy into mechanical energy through the interaction of magnetic fields, which causes the motor to rotate and perform mechanical work. This process follows the principle of electromagnetic induction, where the electrical energy is transformed into kinetic energy. Choice A (Thermal energy) is incorrect as electric motors are designed to minimize heat generation. Choice B (Light) is incorrect as electric motors do not directly produce light. Choice D (Sound waves) is incorrect as electric motors do not primarily convert electrical energy into sound waves.

Correct Answer: A

Rationale: As the frequency of a sound wave increases, its wavelength decreases because the speed of sound remains constant in a given medium. This is described by the formula speed = frequency x wavelength. Therefore, when frequency increases, wavelength must decrease to maintain a constant speed. Summary: Choice A is correct because frequency and wavelength are inversely proportional. Choices B, C, and D are incorrect as they do not follow the relationship between frequency and wavelength in a sound wave.