There are four seasons in some countries. 2. The revolution of the Earth causes day and night. 3. During summer, the North Pole is tilted to its full 23.5 degrees toward the Sun. 4. During winter the northern hemisphere experiences its shortest daylight period. 5. Different parts of the Earth received different amounts of sunlight at different times of the year.

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.