HESI A2 Physics Quizlet

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: A

Rationale: The correct answer is A because density is calculated by dividing mass by volume. For block A, density = 6.5g/16.25cm3 = 0.4 g/cm3. To determine the density of other blocks: B = 80g/32cm3 = 2.5 g/cm3, C = 48g/22cm3 = 2.18 g/cm3, D = 100g/250cm3 = 0.4 g/cm3. Since block A and D have the same density of 0.4 g/cm3, block A is the correct answer. Block B and C have higher densities, so they are incorrect choices.

Correct Answer: B

Rationale: The strength of a magnetic field is measured in units of Tesla (B), named after Nikola Tesla. Tesla is the unit of magnetic flux density. Amperes (A) measure electric current, Volts (C) measure electric potential, and Coulombs (D) measure electric charge. Magnetic fields are not measured in current, potential, or charge units, making B the correct choice.

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: B

Rationale: To calculate momentum, we use the formula p = mv, where p is momentum, m is mass, and v is velocity. Given mass = 45g = 0.045kg and velocity = 42m/s. Substituting the values, we get p = 0.045kg * 42m/s = 1.89 kg⋅m/s. Therefore, the correct answer is B (1.89 kg⋅m/s). Choice A: Incorrect. 0.189 kg⋅m/s is obtained by incorrectly calculating the product of mass and velocity. Choice C: Incorrect. 1.07 kg⋅m/s is not the correct calculation of momentum based on the given values. Choice D: Incorrect. 0.93 kg⋅m/s is an incorrect calculation and does not represent the momentum of the baseball accurately.