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The robotic device of Prob. 6/67 is repeated here. Member AB is rotating about joint A with a counterclockwise angular velocity of 2 red/s, and this rate is increasing at 4 red/s2 Determine the moment MB exerted by arm AB on arm BC if joint B is held in a locked condition. The mass of arm BC is 4 kg, and the arm may be treated as a uniform slender rod.
The VMA of a mixture is 15.0% and the air voids are 4.0%.If the aggregate has a specific gravity (bulk dry) of 2.700 g/cm3 and percent binder absorbed (by the mass of aggregate) is 0.5%, calculate the asphalt content by weight of mix.
A gas containing 80% CH4 and 20% (by mole) He is sent through a quartz diffusion tube to recover the He. 20% by weight of the original gas is recovered and its composition is 50% He.
The 30-Mg freight car A and 20-Mg freight car are moving towards each other with the velocities of VA= 20km/h and VB=10 km/h. A spring mounted on A has k=3 MN/m Determine the maximum compression of the spring mounted on car A.
Two different fluids flow over two identical flat plates with the same laminar free-stream velocity. Both fluids have the same viscosity, but one is twice as dense as the other. What is the relationship between the drag forces for these two plates
You are a construction engineer working on a large concrete foundation project, involving the placement of over 500,000 c.y of concrete. The construction site is adjacent to a salt-water source (bay) & it is decided to set up a concrete batch plan..
What is the velocity of an electron that falls through a magnetic field aligned electric potential of volts across an accelertion region that is 10 k long? (neglect collisions and gravity and assume the electron has zero degree pitch-angle (i.s movin..
(a) Determine the magnitude of the projected components of F acting parallel Fp and normal Fn to line OA. (b) Express these components Fp and Fn in Cartesian vector notation.
Steam enters a long, horizontal pipe with an inlet diameter of D1 12 cm at 1 MPa and 300°C with a velocity of 2 m/s. Farther downstream, the conditions are 800 kPa and 250°C, and the diameter is D2 = 10 cm. Determine
convert the azimuths from north to bearings, and compute the angles, smaller than 180 degrees between successive azimuths 68o06'42", 133o15'56", 217o44'05", 320o35'18"
If a year with occurrence of 2 events such as hurricane and tornado, 2 hurricanes, or 2 tornados is called a disaster year, what is the probability of a disaster year?
Use LRFD and select an American Standard Channel shapefor the following tensile loads. Dead load=54 kips live load= 80 kips and wind load=75 kips. The connection will be with two 9inch long longitudinal welds.
Atrazine, a neutral triazine herbicide manufactured by the Ciba-Geigy group, undergoes biological and chemical decomposition to formhydroxy-atrazine. a).Assuming a pseudo first order decay constant of 0.01/day for atrazinr and 0.005/dayfor hydroxy..
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