The Two Arms of a U-Tube Are Not Identical, One

question 49

Multiple Choice

The two arms of a U-tube are not identical, one having twice the diameter of the other.A cork in the narrow arm requires a force of 16 N to remove it.The tube is filled with water and the wide arm is fitted with a piston.The minimum force that must be applied to the piston to push the cork out is:

• A)4 N
• B)8 N
• C)16 N
• D)32 N
• E)64 N

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