In Addition to Its Weight,what Force Is Needed to Lift

question 41

Multiple Choice

In addition to its weight,what force is needed to lift a wire ring of radius 2.0 cm from the surface of blood plasma? The surface tension of blood plasma is 7.3 × 10¯² N/m.

• A)1.8E+1 N
• B)3.7E-2 N
• C)9.2E-3 N
• D)1.8E-2 N

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