HESI Exams Quizlet Physics

Correct Answer: C

Rationale: The correct answer is C because when the car hits the ground, all of its potential energy is converted into kinetic energy. As the car falls, potential energy decreases while kinetic energy increases. Therefore, the car does not retain any potential energy when it hits the ground. Choice A is correct as the potential energy at the height can be calculated as mgh (mass x gravity x height). Choice B is correct as potential energy is converted to kinetic energy as the car falls. Choice D is incorrect as the potential energy is first converted to kinetic energy, not directly to sound energy.

Correct Answer: A

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: Water. Density is mass per unit volume. Water has the highest density among the options due to its relatively high mass compared to its volume. Mist (A) is a dispersion of water droplets in the air, which has lower density. Steam (C) is water vapor with lower density than liquid water. Ice (D) has lower density than liquid water because its molecules are more spread out in a solid state. Water's density is highest due to its compact molecular arrangement in its liquid form.

Correct Answer: C

Rationale: When a charged particle moves through a vacuum at a constant speed, it generates both an electric and magnetic field. This phenomenon is described by Maxwell's equations in electromagnetism. The moving charge creates a changing electric field which, in turn, induces a magnetic field according to Faraday's law of electromagnetic induction. This interplay between electric and magnetic fields is fundamental to electromagnetism. Choice A is incorrect as the moving charge does not only generate an electric field. Choice B is incorrect because the moving charge does not only generate a magnetic field. Choice D is incorrect because a moving charged particle always generates both electric and magnetic fields due to the fundamental principles of electromagnetism.

Correct Answer: C

Rationale: The correct answer is C because when the car hits the ground, all of its potential energy is converted into kinetic energy. As the car falls, potential energy decreases while kinetic energy increases. Therefore, the car does not retain any potential energy when it hits the ground. Choice A is correct as the potential energy at the height can be calculated as mgh (mass x gravity x height). Choice B is correct as potential energy is converted to kinetic energy as the car falls. Choice D is incorrect as the potential energy is first converted to kinetic energy, not directly to sound energy.