In a laboratory experiment, the water flow rate is to be measured catching the water as it vertically exits a pipe into an empty open tank that is on a zeroed balance. The tank is \(10 \mathrm{~m}\) directly below the pipe exit, and the pipe diameter is \(50 \mathrm{~mm}\). One student obtains a flow rate by noting that after \(60 \mathrm{~s}\) the volume of water (at \(4^{\circ} \mathrm{C}\) ) in the tank was \(3 \mathrm{~m}^{3}\). Another student obtains a flow rate by reading the instantaneous weight accumulated of \(3150 \mathrm{~kg}\) indicated at the 60-s point. Find the mass flow rate each student computes. Why do they disagree? Which one is more accurate? Show that the magnitude of the discrepancy can be explained by any concept you may have.