Learn more about our help with Assignments: Mechanical Engineering
Search
Mechanical Engineering
A closed system executes a series of processes for which two of the three quantities W, Q and ΔU are given for each process. Find the value of the unknown quantity in each case.
a) W = + 10 Hp , Q = + 500 KJ/min, ΔU = ?
b) W = 65 KJ, Q =?, ΔU= -25 KJ
c) W = ?, Q = + 25KJ, ΔU = 0
Mechanical Engineering
Evaluate the nonflow work in terms of p1, V1, p2, V2 of a fluid undergoing a reversible state change in accordance with each of the following defining relations: (a) p = C, (b) V= C , (c) pV = C, (d) pV3 = C, (e) pVlnV = C, (f) p = (200/V2 + 2) psia
Mechanical Engineering
Determine the smallest size of hole that can be punched in 12 mm thick MS
plate having ultimate shear stress of 390 N/mm2 , if permissible crushing
stress for the punch material is 2.4 kN/mm2.
Mechanical Engineering
One kilogram of fresh air is compressed isothermally and reversibly from
1.0 bar and 30 oC to 5.0 bar. Calculate the work done w on the air and
the heat flow q to or from the air.
1.0 bar and 30 oC to 5.0 bar. Calculate the work done w on the air and
the heat flow q to or from the air.
Mechanical Engineering
The elevator starts from rest at the first floor of the building. It can accelerate at 1.5m/s2 and then decelerate at 0.6m/s2. Determine the shortest time it takes to reach a floor 12 m above the ground. The elevator starts from rest and stops.
Mechanical Engineering
A hollow shaft is 225mm outside diameter and 150mm inside diameter.calculate the maximum power this shaft can transmit at 150 rev/min of maximum shear stress is not to exceed 70MN/m^2.calculateths diameter of a solid shaft pf the same material which would transmit the same maximum power at the same speed with the dame stress.
Mechanical Engineering
A 500 cubic feet per minute of air enters a system whose density is 0.075 lbm/ft3 and discharges it with a density of 0.34 lbm/ft3. The pressure at the suction is 10 psia and at the discharge is 80 psia. The increase in the specific internal energy is 35.8 BTU/lbm. Determine the work in Hp.
Mechanical Engineering
find the enthalpy of entropy of steam when the pressure is 20 Bar and specific volume is 0.8
Mechanical Engineering
A hollow shaft is 225mm out side diameter and 150mm inside diameter . calculate,
1. the maximum power this shaft can transmit at 150rev/min if the maximum shear stress in not to exceed 70MN/m^2....?
2. The diameter of a solid shaft of the same material which would transmit the same maximum power at the same speed with the same stress
1. the maximum power this shaft can transmit at 150rev/min if the maximum shear stress in not to exceed 70MN/m^2....?
2. The diameter of a solid shaft of the same material which would transmit the same maximum power at the same speed with the same stress
Mechanical Engineering
A propeller shaft has external and internal diameter 25cm and 15cm, what power can be transmitted at 110 revs/minute with a maximum shearing stress of 75 MN/m^3 and what will be twist in degrees on a 10 meter length of the shaft?.
"assignmentexpert.com" is professional group of people in Math subjects! They did assignments in very high level of mathematical modelling in the best quality. Thanks a lot
#339914 on Dec 2023
#339914 on Dec 2023