What is considered one of the most important innovations of the bicycle? A. the development of the chain-driven rear-wheel
B. the invention of pedals
C. two wheels that are the same size
D. brakes help mee please

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.