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A man riding upward in a freight elevator drops a package off the elevator when it is 100 ft. from the ground. Part A: if the elevator maintains a constant upward speed of 4 ft/s, determine how high the elevator is from the ground the instant the package hits the ground.
Part B: If the package was dropped at t = 0, determine the time t' at which it hits the ground.
the coefficient of the restitution for the collision is e = 0.3, and friction is negligible. if the time duration of the collision is 0.025 s, determine the average impact force which is exerted on the 3 kg body.
In strong winds the force can be quite large. Suppose that a hole is introduced in the building’s roof at point A to make pi equal to the surface pressure there. At what angle ? should hole A be placed to make the net wind force zero?
Five million gallons per day (mgd) of a conservative substance,with concentration of 10 mg/L is released into a stream having anupstream flow of 10.0 mgd and a substance concentration of 3 mg/L.Assume complete mixing.
A civil engineer used a 30-m tape in measuring an inclined distance. The measured length on the slope was recorded to be 459.20 m long. The difference in elevation between the initial and the end point was found to be 1.25 m.
A 30-liter volume of gas at 25 degrees C contains 12 g of methane (CH4), 1 g of nitrogen (N2), and 15 g of carbon dioxide (CO2). Calculate (a) the moles of each gas present, (b) the partial pressure exerted by each gas, and (c) the total pressure ..
As the piston is compressed, the pressure also increases by 2000000 Pa. If there is 4 times as many atoms of nitrogen as helium, how many moles of helium are in the cylinder?
In a water table aquifer bounded on the ends by rivers, the hydraulic conductivity is 50 m/day. The hydraulic heads at x = 0 and x = 1000 m are 100 m and 90 m, respectively.
Write a simple MATLAB program that will estimate the area of a circle using the lower and upper bounds (using triangles). The user will input the diameter of the circle and the desired accuracy (relative error ) and the program must run
Draw a P-V diagram for pure component and label appropriate points such as superheated region, isothermal line, etc.
The solids in a specimen have a specific gravity of 2.65. If the oven-dry mass of the specimen is 25 kg, what is the volume of the solids in it
Property taxes,insurance and storage will run 5%.What is the owning cost for the dozer?Use the time value method to calculate the depreciated portion of the ownership cost.
A large closed tank is pressurized as shown. A jet of fluid issues from a small hole. Assume the flow is incompressible, irrotational, quasi-steady and the only body force acting is gravity.
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