Avolumetric flask made of pyrex is calibrated at 20.0°c. it is filled to the 285-ml mark with 38.0°c mercury. after the flask is filled, the mercury cools and the flask warms so that the combination of mercury and flask reaches a uniform temperature of 32.0°c. the combination is then cooled back to 20.0°c. (the average volume expansion coefficient of mercury is 1.82 10-4(°c)−1.) (a) what is the volume of the mercury when it cools to 20.0°c? ml (b) at the temperature of 32.0°c, does the level of mercury lie above or below the 285-ml mark on the flask? above belowa volumetric flask made of pyrex is calibrated at 20.0°c. it is filled to the 285-ml mark with 38.0°c mercury. after the flask is filled, the mercury cools and the flask warms so that the combination of mercury and flask reaches a uniform temperature of 32.0°c. the combination is then cooled back to 20.0°c. (the average volume expansion coefficient of mercury is 1.82 10-4(°c)−1.) (a) what is the volume of the mercury when it cools to 20.0°c? ml (b) at the temperature of 32.0°c, does the level of mercury lie above or below the 285-ml mark on the flask? above below

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.)