Cho tải trọng chân cột như sau: Ntc = 200 kN, Lực ngang Htc = 6 kN và Mô men Mtc = 12 kNm. Đất nền có các thông số như sau: γ = 17 kN/m3
, lực dính c = 10 kPa, góc ma sát trong φ = 20o và
mức nước ngầm ở rất sâu so với đáy móng. Lấy γtb = 20 kN/m3
. Dự kiến bề rộng móng b = 1,2m.
1. Nếu chọn hệ số an toàn = 1 và bỏ qua ảnh hưởng lực dính, độ sâu đặt móng

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.