Which has more resistance, a copper wire with length 5 m and area 25 m2 or a copper wire with length 10 m and area 50m2 ? ( r = rho l/a).

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.