Q1: When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to

ANS:B - weight of the fluid displaced by the body

When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to the weight of the fluid displaced by the body. This principle is known as Archimedes' principle. According to Archimedes' principle, when an object is submerged in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the object. This buoyant force counteracts the weight of the object, causing it to feel lighter in the fluid. The buoyant force is a result of the pressure difference between the top and bottom of the submerged object. The pressure at the bottom of the object is higher than at the top, which results in a net upward force. Therefore, the correct statement is: weight of the fluid displaced by the body.