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When drawing a FBD, how do you know which direction the x, y and z components are applied? I know that the sum of forces in each direction and the moments about each axis have to equal zero so I know some FBD are pretty self explanatory. Is it guess and check or is there a specific way of telling which direction to apply the force components for a more complicated problem?
A composite price index for the cost of vegetarian foods called eggs, artichokes, and tofu (EAT) was 330 ten years ago and has averaged an annual increase of 12% since. Calculate the current value of the index.
Tall buildings can develop a significant difference in pressure between the inside and the outside of the building. Air lock entrances are used at the ground level so the pressure at the ground floor is not the same as atmospheric pressure.
you are part of the structural engineering design team on the design of a new five story office building. the
a temperature probe moves with the velocity 2i+2j-3k through air. the temperature of air changes as T(x,y,z,t)=(2x^2-3y+z^3)cos(at). Find the rate of change of temperature measured by the probe.
Design the temperature reinforcement, tie bars, and dowel bars for a highway concrete pavement with 13 inch slabs, f'c=3500 psi, traverse joints at 35 ft apar,t and with 3 12 ft lanes each way. Use grade 60 steel
Water at a flow rate of 1 kg/s is flowing in a pipe of internal diameter 5 cm. If the inside pipe surface temperature is 90 degrees C and mean bulk water temperature is 50 degrees C
Design the roof slab as a one-way slab system and use the worst case design scenario to determine the reinforcing for the entire roof
what is the difference between normal stress and allowable shear stress. What is the difference between axial and hoop stress and how do you calculate tensile force per mm.
If = 300 N , determine the required minimum compression in the spring so that the wedge will not move to the right. Neglect the weight of A and B. The coefficient of static friction for all contacting surfaces is .2 Neglect friction at the rollers..
If a concrete beam with a f'c=4000psi experiences a drop in temperature of 30 Degrees F, What is the internal tensile stress. Will the concrete crack. What could i do to prevent cracking.
The coal has an ash content of 12% by mass. Forty percent of the ash falls out the bottom of the furnace. The rest of the ash is carried out of the furnace with the hot gases into an electrostatic precipitator (ESP).
A certain fluid at 15 psia is contained in a cylinder behind a frictionless piston. The initial volume of the fluid is 300 in^3. The fluid expands to a volume of 450 in^3 while the pressure increases to 25 psia.
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