Q. A telescope consists of a mirror with radius of curvature 7.3 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 198, what focal length eyepiece should she use?
Q. A 195 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a battery with an emf of 24.0 V. If the 195 pF capacitor stores 125 pC of charge on its plates, what is the unknown capacitance?