A velocity selector has a magnetic field of magnitude 0.22 T perpendicular to an electric field of magnitude 0.44 MV/m. What must the speed of a particle be for it to pass through undeflected?

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.