consider an air-filled parallel plate capacitor with plate area A and gap width d. the plate charge is Q. After the capacitor has been fully charged to Q, the battery is disconnected. Then the gap is filled with a dielectric with dielectric constant k. what is the voltage within the gap in the presence of the dielectric

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Newtons view of arrangement of the universe

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.