NLN PAX Exam Verbal/Science Practice Questions with correct answers

A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct measurements can the student make as a result of this experiment? A) The approximate focal length of the lens. B) The approximate wavelength of the light used. C) The approximate speed of light. D) The approximate index of refraction of the lens material. CORRECT ANSWER A) Approximate focal length of lens The bending of a wave around an obstacle is known as A. diffraction. B. deflection. C. refraction. D. reflection. CORRECT ANSWER A) Diffraction Which of these temperatures is known as Absolute Zero? A. 0°C B. 0 K C. positive 273°C D. negative 273 K CORRECT ANSWER B) 0 K A lab technician has the choice of four different enzymes to use in an experiment that will run at 25°C. The optimal temperatures of enzymes using the Kelvin scale are: Enzyme A: 273 K, Enzyme B: 298 K, Enzyme C: 310 K, Enzyme D: 325 K. Which enzyme would be the best to use in this experiment? A. Enzyme A B. Enzyme B