Which of the following statements is false? A. Scalar quantities have size or magnitude only
B. Vector quantities have both magnitude and direction
C. Mass, length and time are all scalar quantities
D. Distance, velocity and acceleration are all vector quantities

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.

Protons have a positive charge and, collectively, give an element its atomic number.