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Chemistry 12 Online
OpenStudy (anonymous):

Identify two simple machines in this compound machine. A. screw, lever B. screw, incline plane C. double pulley D. lever, pulley http://static.k12.com/calms_media/media/1140500_1141000/1140512/2/0139ff8728baea4cfd83e1f0d616c9674804fc9c/MS2_PHY_06_09_108_PIC_wine_bottle_opener.jpg

OpenStudy (zairahernandez):

I believe C. Take a look?

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