Engineering, 06.10.2021 18:50 BluVoid9255
Một mẫu đá cân trong không khí được 80 g, sau khi bọc bề mặt bằng parafin cân được 80,72
g, sau đó đem cân trong nước được 37 g. Xác định khối lượng thể tích của mẫu đá? Biết khối
lượng riêng của parafin là: 0,9 g/cm3
; của nước 1,0 g/cm3
Answers: 2
Engineering, 03.07.2019 14:10
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Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10
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
Answers: 1
Một mẫu đá cân trong không khí được 80 g, sau khi bọc bề mặt bằng parafin cân được 80,72
g, sau đó...
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