The escalator that leads down into a subway station has a length of 24.5 m and a speed of 2.0 m/s relative to the ground. a student is coming out of the station by running in the wrong direction on this escalator. the local record time for this trick is 11 s. relative to the escalator, what speed must the student exceed in order to beat the record?

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.