The jet streams follow the contours of low and high pressure areas (troughs and ridges), which move like waves in the atmosphere across the earth. How does the movement and effects of the polar jet stream change when it is winter in the Northern Hemisphere?

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

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.