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4. A square plate with edge length 9.10 cm and mass 488 g is hinged along one side. If air is blown over the upper surface only, what speed must the air have to hold the plate horizontal? The air has density 1.21 kg/m3. (Hint: Apply the principle of the dynamic li

4. A square plate with edge length 9.10 cm and mass 488 g is hinged along one side. If air is blown 
over the upper surface only, what speed must the air have to hold the plate horizontal? The air 
has density 1.21 kg/m3. (Hint: Apply the principle of the dynamic li

Grade:12

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