HESI A2 Physics Quizlet

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: The speed of light. In Einstein's mass-energy equation (E=mc^2), 'c' represents the speed of light in a vacuum, which is approximately 3 x 10^8 meters per second. This constant is crucial in the equation as it shows the relationship between mass and energy. The speed of light is a fundamental physical constant and plays a significant role in various aspects of physics, including relativity. Incorrect choices: A: Distance in centimeters - Distance in centimeters is not represented by 'c' in Einstein's equation. C: Degrees Celsius - 'c' does not represent temperature in degrees Celsius in the equation. D: Centrifugal force - 'c' does not represent centrifugal force in the equation.

Correct Answer: B

Rationale: To find the object distance, we can use the mirror formula: 1/f = 1/di + 1/do. Given f=2 cm, di=6 cm, we can solve for do. Plugging in the values, we get 1/2 = 1/6 + 1/do. Solving for do, we get do=6 cm. Therefore, the correct answer is B (6 cm). Choice A (3 cm) is incorrect because it does not satisfy the mirror formula equation. Choice C (12 cm) and D (30 cm) are also incorrect as they do not correspond to the calculated object distance of 6 cm.

Correct Answer: A

Rationale: The correct answer is A because the second law of thermodynamics states that the total entropy of an isolated system always increases over time in a spontaneous process. This increase in entropy signifies an increase in disorder and randomness within the system and its surroundings. Therefore, choice A is correct as it aligns with the fundamental principle of entropy and the second law of thermodynamics. Choices B, C, and D are incorrect as they contradict this law by suggesting a decrease in total entropy, constancy of entropy, or a decrease in system entropy, respectively.

Correct Answer: D

Rationale: To calculate power, we use the formula P = W / t, where P is power, W is work done, and t is time taken. The correct formula is D: P = F / t. Power is the rate at which work is done, so it is the work done per unit time. Therefore, the correct formula depicts power as the force applied divided by the time taken to do the work. Incorrect choices: A: P = W / F - This formula is incorrect because power is not work divided by force. B: P = d / t - This formula is incorrect because power is not distance divided by time. C: P = W x t - This formula is incorrect because power is not work multiplied by time. In summary, choice D is correct because power is defined as work done per unit time, which is represented by force divided by time.