Insulators prevent the loss of heat. a company is designing a mug that will keep coffee warm for a long time. which one of these materials would do the best?

a. copper
b. steel
c. lead
d. rubber

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.