In the lab, you will be creating shallow water waves with a "ripple" generator. When you attach a long horizontal rod to the generator it makes plane waves that behave much like waves on a string (see chapter 15). The speed of the waves in the ripple tank depends on the depth of the water layer. In the lab, you will measure the wavelength of the plane waves for different frequencies at the same depth of the water. When you double the frequency you expect the wavelength to
a. become has as large as before
b. stay the sama
c. become four times as large as before
d. become twice as large as before

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.)