April rubs a felt cloth against a plastic rod to charge the cloth and the rod. What type of charging is this? HINT: Are the felt cloth and plastic rod considered conductors or insulators? Do they touch or are they just brought close together?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y