Beaker with water on a weighing scale

AI Thread Summary
When a finger is inserted into a beaker of water on a weighing scale, the balance will be upset due to the displacement of water, causing the side with the beaker to appear heavier. This occurs because the water exerts an upward force on the finger, which in turn affects the overall weight of the system. If a wooden or steel rod is used instead of a finger, similar principles apply, as both objects will displace water and exert forces. The water level will rise regardless of the object used, confirming that any object submerged in the water impacts the weight measured by the scale. Overall, inserting any object into the water alters the balance due to the principles of buoyancy and displacement.
whoelsebutme
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beaker with water on a weighing scale...

A weighing scale has a beaker of water on one side and a balancing
weight on the other side.

You put your finger into the water carefully without touching the beaker. Will the balance be upset?

Which side will appear heavier, if so?

What will happen in instead of your finger you hold a wooden rod or a steel rod in the water, but without touching the beaker?
 
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What do you think? When you stick your finger in the water are you exerting a force on the water/beaker system? (Hint: Does the water exert a force on your finger?)
 
Doc Al said:
What do you think? When you stick your finger in the water are you exerting a force on the water/beaker system? (Hint: Does the water exert a force on your finger?)

I think it does...
 
Displacement of the water :P ?
 
whoelsebutme said:
I think it does...
Of course it does. Also note that when you stick your finger in the water, the water level rises.
 
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