An empty parallel plate capacitor is connected between the terminals of a 4.4-v battery and charged up. the capacitor is then disconnected from the battery, and the spacing between the capacitor plates is quadrupled. as a result of this change, what is the new voltage between the plates of the capacitor?
i have: e = v/de =9 vthen the distance is doubled 9(2) = 18 v

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

In a good thermo flask the main cause of heat loss is

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants