Ethan pushes a wooden box across a carpeted floor. then he pushes the same box across a smooth marble floor. why does ethan find it easier to push the box on the marble floor than on the carpeted floor?

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Which position represents spring in the southern hemisphere? a) b) c) d)

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.