Biopotentials and Electrodes (20 points) a. Explain why an electrolyte is needed in the recording of a biosignal. (5 points) b. Provide a circuit schematic representing the electrode and electrolyte interaction. Label each component. Derive an expression for equivalent impedance. Show all work. (5 points) c. Often, after prolonged use, the electrolyte gel begins to dry out and change the characteristic of the electrodes. Discuss how the equivalent impedance will change as the electrolyte gel dries out. In the extreme case where there is no electrolyte gel left, what does the equivalent circuit of the electrode look like? (5 points) d. After some time, you notice the electrode becomes dull and voltage readings drop. You wipe the electrode with steel wool and reapply the electrolyte. What affect do you anticipate this will have on your readings? (5 points)

2b2t

explanation:

2b2t

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

can you list the answers so i can answer