What is the main topic of this equation?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.