Place the following gases in order of increasing average velocity at 300 K: Ar, CH4, N2, and N2O. a. Ar = CH4 = N2 = N2O
b. N2O < Ar < N2 < CH4
c. N20 < N2 < CH4 < Ar
d. Ar < N2 < N2O < CH4
e. CH4 < N2 < N2O < Ar

d.) circle motion requires a force to give it a centripetal acceleration.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

the answers are

c and c