\fD Question 2 2 pts nts Look at figure 6.1A in the lab manual. If fluid is flowing through the microfluidic device, how does the velocity of the fluid in the wide channel (vw) compare to the velocity of the fluid in the narrow channel (UN)? O VW UN D Question 3 2 pts Explain your reasoning for your previous answer. Edit View Insert Format Tools Table 20px ~ Paragraph B I U A Q V TExploring Fluid Dynamics and the Hagen-Poiseuille (H-P) Equation In this lab we will be analyzing video data gathered previously, using the microscopes, for fluid flow in two different microfluidic devices. These microfluidic devices serve as excellent models for fluid flow in biological systems. By analyzing flow videos in ImageJ, we can explore the effect of device geometry on the velocity, v, of the beads in the fluid. The beads serve as "tracers" and tell us how fast the fluid itself is moving. You will be qualitatively analyzing both devices (see diagram below) and quantitatively analyzing videos from one of these devices. dw WIDE dw WIDE NARROW dNNARROW Figure 6.1: Microfluidic channels in series (A) and in parallel (B). Both of the devices consist of two channels connected to each other. In Device A, the wide and narrow channels are connected in sequence. In Device B, the wide and narrow channels are next to each other, but both fed from the same inlet and outlet. In other words, the channels of Device A are in "Series" and the channels of Device B are in "Parallel." In these devices, the width, d, of the wide channel (6.0 mm) is twice the width of the narrow channel (3.0 mm), and the lengths and depths (not shown in the top view) of the wide and narrow channels on each slide are equivalent. To drive the fluid through the devices, the video makers used a plunger syringe and applied a force to the plunger that was as steady and repeatable as possible. 41D Question 4 2 pts Again in figure 6.1A, how should the volumetric flow rate in the wide channel ( Qw) compare to the volumetric flow rate in the narrow channel (QN)? O QW > QN O Qw = QN O QW UN O Uu = UN O UW QN O QW = QN O QW