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The owner of a van installs a rear-window lens that has a focal length of -0.295 m. When the owner looks out during the lens at a person standing directly behind the van, the person appears to be now 0.242 m from the back of the van, and appears to be 0.339 m tall.
1) How tall is the person?
2) How far from the van is the person actually standing?
a particle moves in the xy plane with constant acceleration. at time zero the particle is at x 7.0 m y 7.0 m and has
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A professor's office door is 0.94 wide, 2.2 high, 4.0 thick; has the mass of 23, and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame. When the door is open and at rest, the door closer exerts a torque of 5..
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