What is the speed of a 400 eV (a) electron, (b) proton, and (c) alpha particle? A capacitor has a capacitance of 8.0 microFarad with air between its plates. Determine its capacitance when a dielectric with dielectric constant 6.0 is placed between its plates. What is the charge on a 300 pF capacitor when it is charged to a voltage of 1.0 kV? A certain parallel-plate capacitor consists of two plates, each with area 200 cm² , separated by a 0.40 cm air gap. (a) Compute its capacitance. (b) If the capacitor is connected across a 500 V source, find the charge on it, the energy stored in it, and the value of E between the plates. (c) If a liquid with K = 2.60 is poured between the plates so as to fill the air gap, how much additional charge will flow onto the capacitor from the 500 V source?

Here are the solutions to your physics problems: What is the speed of a 400 eV (a) electron, (b) proton, and (c) alpha particle? The kinetic energy (KE) is given as 400 eV. We convert this to Joules: KE = 400 eV × (1.602 × 10^-19 J/eV) = 6.408 × 10^-17 J The formula for kinetic energy is KE = (1)/(2)mv^2, so the speed v can be found using $v =