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the hammer of a pile driver of mass 15000kg falls freely through a distance of 2m onto a pile. The impact takes place in 0.02 seconds and the hammer does not rebound. determine the average applied force exerted on to the pile hammer. Note because the force is applied over a short time period it can be considered as an impulse force.
A 10 kW electric heater is used to heat 2 kg of air contained in an insulated rigid tank from 400 kPa and 50 °C to 200 °C. The ambient air temperature and pressure is 20 °C and 100 kPa, respectively.
Solve for the pressure of a gas using both equations at a temperature of 400K and a molar volume of 1x 10-4 m3/mol. For the van der Waals EOS, use parameters of a= 4.1x10-1 (m3/mol)2 Pa, and b=4.3x10-5 m3/mol.
calculate the position of the quasi-Fermi levels for electrons and holes with respect to the intrinsic level (assume that ni=1.5x10^10cm^-3).
Estimate the infiltration flow rate if the window is partially open (assuming the window open area is 2 meter squared).
Remember that velocity is a vector quantity so find the magnitude of the average velocity and the angle of average velocity from the horizon
Prove that the transformation Q1 = q12 Q2 = q2 sec p2 p cos p2 - 2q2 P= 1 P2 = sin p2 - 2q1 1 2q1 cos p2 is canonical, by any method you choose . Find a suitable generating function that will lead to this transformation.
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 18 MPa. The condenser pressure is 6 kPa. How do I determine the quality of the fluid at the turbine exit
Determine the distance d between the cars at which the driver of car A must apply his brakes to just avoid colliding with carB.
A car and a high -speed trian at constant speeds. three seconds after the train passes under the highway bridge the car crosses the bridge.
Draw the T-s diagram (hint: it would help to begin with a schematic of the cycle) and.
calculate the enthalpy change of the universe during the process. Cp=Cv = 4.18 kj/kgK
Determine the rate of metal removal when the wheel is engaged in the work and if the number of active grits per square inch = 200, determine the average chip length and the number of chips formed per time
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