## anonymous one year ago you will pull (by hand) out on the plunger of a closed ended syringe and thus create a vacuum. The diameter of the syringe is about 2.0 cm. What amount of force will you have to provide? (Hint: air pressure will exist on only one side of the piston)

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|dw:1444294472743:dw| find the force excerted on the surface of the plunger by the atmospheric pressure ($$P_a\times A$$) . Then, $F = P_aA$