CP Deflecting Plates of an Oscilloscope. The vertical deflecting plates of a typical classroom oscilloscope are a pair of parallel square metal plates carrying equal but opposite charges. Typical dimensions are about 3.0 cm on a side, with a separation of about 5.0 mm. The potential difference between the plates is 25.0 V. The plates are close enough that we can ignore fringing at the ends. Under these conditions: (a) how much charge is on each plate, and (b) how strong is the electric field between the plates? (c) If an electron is ejected at rest from the negative plate, how fast is it moving when it reaches the positive plate?
Ch. 2 Plate Tectonics • Types of Rocks o Igneous: from magma or lava o Metamorphic: altered through heat and/or pressure o Sedimentary: reformed bits of other rocks, broken down or from solution • Crust, mantle, core, and inner core are the layers, respectively, of the earth o The upper mantle and crust form a rigid lithosphere, which lies on top of a less rigid layer (where the rocks are actually moving) called the asthenosphere o The atmosphere is made mostly of nitrogen, and then about a quarter is oxygen with a little bit of argon and carbon dioxide mixed in • Plate tectonics: the plates of the earth’s crust have broken as the earth has cooled down and shift along,
