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1.A 7 lb particle at rest is subjected to the action of its weight and forces F1= (2i+6j-2tk)lb, F2=(t^2i -4tj-1k) lb, and F3 =(-2ti) lb, where t is in seconds. the particle starts at the origin (0,0,0). determine the distance the ball is from the origin 4s after being released.
2.Each type of polymer has difference tensile behaviour, which one of the following types exhibits brittle nature at room temperature
a.Network
b.Linear
c.Elastomers
d.Linear and network
e.None of the above
3.A 25-mm diameter steel cylinder 300-mm long falls, because of its own weight, at a uniform rate of 0.1 m/s inside a tube of slightly larger diameter. A castor-oil film of constant thickness is between the cylinder and the tube. Determine the clearance between the tube and the cylinder. The temperature is 38 degrees Celsius. The specific gravity of steel=7.85
The coefficient of friction between a car's tires and the road is such that the car can generate a maximum deceleration of 1.1g without experiencing slip.
Consider some hypothetical X+ - Y - ion pair for which the equilibrium interionic spacing and bonding energy values are 0.38 nm and - 6.38 eV respectively. If it is known that n in the equation has a value of 10
A single-scoop ice cream cone is a composite body made from a single scoop of ice cream placed into a cone. Assume that the scoop of ice cream is a sphere with radius = 3.36cm that is placed into a 9.90cm tall cone.
A crest vertical vurve and a horizontal curve on the same highway have the same design speed. The equal-tangent vertical curve connects a +3% initial grade with a +1% final grade and has a PVC at 101+78 and a PVT at 106+72
Calculate the relative velocity of a solute front that is flowing through an aquifer. The organic carbon partitioning coefficient (Koc) is 6 mL/g and the friction of organic carbon in the soil is 2%.
Calculate the the oritical oxygen demand (mg/L) of a solution containing 450 mg of glucose(C6H12O6) in 2 liters of distilled water.
If 500 mL of benzene is spilled in a sealed room (64m^3), and it completely evaporates, what mass of GAC filters (Cmax = 80 mg benzene/1 g GAC) will be required to reach the permissible exposure limit for benzene
Traction and Total Resistance, Would you please help me with the following question: A 90 tonne rear dump truck travels on an 8% grade loose gravel road.
1 discuss the different agencies institutes centers and other national bodies that are involved in environmental work
A canal was constructed running parallel to a river 1500 ft away. Both fully penetrate a sand aquifer with a hydraulic conductivity of 1.2 ft/d. The area is subject to rainfall of 1.8 ft/y and evaporation of 1.3 ft/y.
A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
An industry is illegally discharging benzene into a river. The concentration in the river at the point of discharge is 0.2 mg/L. A drinking water treatment plant (DWTP) is located 1.5 km downstream. The water velocity in the river is 0.35 km/day.
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