A student prepared a standard stock copper(II) sulfate solution with an absorbance value of 0.862. The student then decided to prepare a second solution containing copper(II) sulfate from the standard stock solution. What combination of volumetric pipette and volumetric flask should the student use in order to prepare a second solution from the stock standard that will also fall within the Beer’s law absorbance limit that we discussed in class

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.