1. The researchers mentioned in this activity studied various contributors to happy relationships by a. running an experiment with married versus unmarried couples.
b. surveying thousands of married couples.
c. surveying thousands of unmarried couples.
d. studying the same couples over a long period of time.
2. Among the relationship strengths studied, the measure that had the highest percentage of agreement from happy couples was

a. financial consensus.
b. personality.
c. communication.
d. family values.
3. Which of the following relationship strengths was NOT among those studied in this research?

a. Financial consensus
b. Closeness
c. Flexibility
d. Communication

You are still fascinated by the process of inkjet printing, as described in the opening storyline for this chapter. you convince your father to take you to his manufacturing facility to see the machines that print expiration dates on eggs. you strike up a conversation with the technician operating the machine. he tells you that the ink drops are created using a piezoelectric crystal, acoustic waves, and the plateau-rayleigh instability, which creates uniform drops of mass m = 1.25 ✕ 10−8 g. while you don't understand the fancy words, you do recognize mass! the technician also tells you that the drops are charged to a controllable value of q and then projected vertically downward between parallel deflecting plates at a constant terminal speed of 20.0 m/s. the plates are ℓ = 2.15 cm long and have a uniform electric field of magnitude e = 6.40 ✕ 104 n/c between them. noting your interest in the process, the technician asks you, "if the position on the egg at which the drop is to be deposited requires that its deflection at the bottom end of the plates be 0.17 mm, what is the required charge on the drop (in c)? " you quickly get to work to find the answer. (neglect the force of gravity.)