A vector, B, when added to the vector C=3î+4j yields a resultant vector which is in the positive y direction and has a magnitude equal to that of vector C. What is the magnitude of B?

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.