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3 objects are connected on an inclined table with the masses of 8.0kg, 4.0kg and 2.0kg and the pulleys are frictionless. The tabletop is rough, with a coefficient of kinetic friction of 0.47 and makes an angle of 20.0 degrees with the horizontal.
a) draw a free body diagram for each object.
b) determine the acceleration and direction of the motion of the system.
c) determine the tensions in the 2 cords.
A 5p-mm-focal-length lens has f-stops ranging from f/1.4 to f/22. What is the corresponding range of lens diaphragm diameters
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