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1 a copper-antimony alloy containing 95 weight antimony is allowed to cool from 650degc to room temperature describe
what are the five main generic classes of metals for each generic classa give one example of a specific component made
explain what is meant by the following termsa structure-sensitive propertyb structure-insensitive propertylist five
identify the role of water in the degradation of concretewater sources rainwater groundwater condensation humidity
1 the radius and length of a steel cylinder are 60 mm and 120 mm respectively if the mass density of steel is 7850 kgm3
the force system consists of the force p - 300i 200j 150k lb and the couple c determine the magnitude of c if the
the overhead electric hoist c rides along a track on the horizontal beam ab in addition to the 500-kn vertical force
during a storm wind exerts a pressure of 23 lbft2 normal to the surface of the stop sign determine the resultant force
the force-couple system consists of the force r 250i 360j - 400k n and the couple-vector cr 1200i750j560k nmiddotm
the transmission tower oa is being hoisted into position by the cables ab and ac the resultant of the cable tensions p
a replace the force system shown with a force-couple system with the force acting at point ob determine the wrench that
the homogeneous 40-kg bar abc is held in position by a horizontal rope attached to end c neglecting friction determine
the center of gravity of the 850-n man is at g if the man pulls on the rope with a 388-n force determine the horizontal
when the truck is empty it weighs 6000 lb and its center of gravity is at g determine the total weight w of the logs
draw an fbd of member ce of the frame described in the previous problem how many unknowns appear on this
the mechanism shown is a modified geneva drive-a constant velocity input produces a varying velocity output with
the 90-kg man whose center of gravity is at g is climbing a uniform ladder the length of the ladder is 5 m and its mass
the homogeneous 18-kg pulley is attached to the bar abc with a pin at b the mass of the bar is negligible the cable
the 1200-kg car is being lowered slowly onto the dock using the hoist a and winch c determine the forces in cables ba
a draw the free-body diagrams for the entire assembly or structure and each of its parts neglect friction and the
the dump truck consists of a chassis and a tray with centers of gravity at g1 and g2 respectively with the tray down
the self-regulating floodgate abc pinned at b is pressed against the lip of the spillway at c by the action of the
the supporting structure of the billboard is attached to the ground by a pin at b and its rear leg rests on the ground