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Question 16 (4 points) Saved An oil drop with a mass of 2.50 x10^-15 kg is balanced between two parallel, horizontal plates 2.0 cm apart, maintained at a potential difference of 300 V. The upper plate is positive. Calculate the charge on the drop in coulombs and as a multiple of the elementary charge. Determine whether there is an excess or a deficit of electrons. Paragraph B I U v OB -+ Add a File Record Audio Record Video Scanned Document 10.pdf (1.77 MB) X Question 17 (6 points) Saved Consider a mass spectrometer used to separate the two isotopes of uranium, 12 238 U3+ (3.952 x 10^-25 kg) and 235UP (3.903 x 10^-25 kg). Assume the ions enter the magnetic field region of strength 7.5 T with identical speeds and leave the spectrometer with a separation of 2.4 mm (as measured from the entry point) after completing a half-circle turn. Calculate the initial speed of the ions. Paragraph B IUVA Ev + . .. GLG