You and your friend are going bungee jumping! You wait directly below them with a camera. When they leap from the bridge they begin to let out a yell of excitement (or possibly fear) that sounds like the musical note G (392 Hz) as they fall towards you and E (330 Hz) as they bounce back away from you. They continue to yell as they bounce up and down in simple harmonic motion. You notice the pitch of their yell changes as they move toward and away from you. The time in between the highest pitch and lowest pitch is 10 seconds. What is the amplitude of their simple harmonic motion

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.)