Which is a true statement about electromagnetic waves? A. Even though you cannot feel them you are always being showered by them.
B. You can always feel them interacting with you.
C. Electromagnetic waves are never dangerous.

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.