HESI Exams Quizlet Physics

Correct Answer: A

Rationale: The correct answer is A: 10 m/s. Velocity is calculated by dividing the distance traveled by the time taken. In this case, velocity = 100m / 10s = 10 m/s. Choice B, 90 m/s, is incorrect because it is not the accurate calculation. Choice C, 110 m/s, and choice D, 1,000 m/s, are both incorrect as they do not align with the correct formula for calculating velocity. The key is to remember that velocity is a vector quantity that includes both speed and direction, and in this case, we are only concerned with the speed of the object, making choice A the correct answer.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: 1.8 N. The repulsive force between two charges can be calculated using Coulomb's Law: F = k * (q1 * q2) / r^2, where k is the electrostatic constant (9 x 10^9 N m^2/C^2), q1 and q2 are the charges (5 μC each), and r is the distance between the charges (25 cm = 0.25 m). Plugging in the values, we get F = (9 x 10^9) * (5 x 10^-6) * (5 x 10^-6) / (0.25)^2 = 1.8 N. Choice A is incorrect because it is too low. Choice C is incorrect because it represents a very low force. Choice D is incorrect because it is equivalent to 5 x 10^-3 = 0.005 N, which is not the correct value

Correct Answer: B

Rationale: The correct answer is B (15.625 cm). To calculate the image height using mirror formula (1/f = 1/v + 1/u), first find the object distance (u) which is -20 cm (since object is placed on the same side as focal point, it is negative). Then, solve for image distance (v) by substituting u and f values. Next, use magnification formula (m = -v/u) to find the magnification factor. Finally, multiply the object height by the magnification factor to get the image height, which is 15.625 cm. Choice A (30.5 cm) is incorrect as it is double the correct answer. Choice C (-15 cm) and choice D (-30.5 cm) are incorrect as the negative sign indicates an inverted image, but in this case, the image is upright.

Correct Answer: B

Rationale: Sure! Pascal's principle states that a pressure change applied to a confined incompressible fluid is transmitted undiminished throughout the fluid. This is because the fluid transmits the pressure equally in all directions. The other choices are incorrect because: A: Pressure is not amplified, it remains constant. C: The pressure change is not limited by the container size. D: The fluid type may affect other properties, but not the transmission of pressure.