Water at a gauge pressure of 3.8 atm at street level flows into an office building at a speed of 0.65 m/s through a pipe 5.6 cm in diameter. the pipe tapers down to 2.6 cm in diameter by the top floor, 20 m above (fig. 10-53), where the faucet has been left open. calculate the flow velocity and the gauge pressure in such a pipe on the top floor. assume no branch pipes and ignore viscosity.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?