Water at a pressure of 4.80 atm at street level flows into an office building at a speed of 0.80 m/s through a pipe 6.80 cm in diameter. the pipes taper down to 2.50 cm in diameter by the top floor, 29.0 m above. calculate the water pressure in such a pipe on the top floor.

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

When an object is heated it contracts. a. true b. false

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons