Most Science Teachers Couldn't Explain What Would Happen

[@CHEESYhairyGASH]

This is really nice. You can follow this up by asking the same question, this time with the crane that is holding the mass placed on the same enlarged balance. Or even have the crane on a separate balance. Another great question is to consider a tennis ball in a beaker of water. The ball is being held entirely below the water level by a string that is attached to the bottom of the beaker. The system is placed on a balance, the reading is recorded. The string is then cut. What happens to the reading? Another one was given to a student that had an interview at the University of York: A sand timer (hourglass) has all its sand in one chamber, this sand timer allows only one grain of sand through at a time, and all grains of sand are the same mass (they are totally uniform). You upturn the sand timer and place it on a balance, so that the empty chamber now sits at the bottom. Describe and explain what happens to the reading on the balance.

[@theslowmo1444]

It would stay the same since the upthrust provided would decrease the tension on the string, leading the mass balance to decypher incorrectly that the weight would decrease, adding to my statement that it would stay the same. :)

[@Stewartthorp]

Inreases. upthrust is exerted by the water on the mass. tension on the string would decrease

[@theslowmo1444]

Not too sure what happened with the description sirrreeeee

[@YO-BIZZY]

stay the same, because the fluid will just move out of the way of the volume that is being displaced. The weight of the object will be countered by the thing that is holding it up, so the crane here. Fluid is displaced, after displacement, there will be no change observed

[@Andromeda4482]

Intuition says it will increase, because if I add a mass to a beaker and let it fall to the bottom of the beaker, the mass of the system has increased. Regardless of whether a string is attached. But, that said - Newtons third law, the weight component of the mass acts downwards, the bouyant force acts upwards, but the bouyant force acting upwards will have an opposite reaction with the pan scale downwards. And since the buoyant, and reaction force are equivalent with some proportionality to the mass, the force on the pan wrt to boyant force will also be proportional to the mass. So it increases?