Problem 431
Can anyone help me how to calculate the zero moments in the questions?
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Can anyone help me how to calculate the zero moments in the questions?
tdx/dx = 6t(e^ 2t) +x(2t-1)
A solid shaft made from copper is 90mm diameter and 8m long. If this shaft is joined to a 1.5m long solid steel shaft and 120mm diameter, estimate the maximum shear stress in each material and the total angle of twist of the entire shaft, if a torque of 20KN-m is applied to each end of shaft. GC=40GN/m2 G=90GN/m2
can anyone help with Hoists and Haulages in engineering mechanics?

Pahelp naman po.
Paano mo gagawin dito? Paano din po ung solution. Thank you po.
please help me with this!!!
Im really having hard time getting this.
Region 1 is bounded by the x axis, the line x=1 and the curve y=x^2. Region 2 is bounded by the two curves y=x^2 and x=y^2. Region 3 is bounded by the y axis, the line y=1 and the curve x=y^2. Find the volume and centroid of the solid generated when the indicated region is revolved about the given line:
A. Region 1 is revolved about y axis
Region 1 is revolved about x axis
B. Region 2 is revolved about y axis
Region 2 is revolved about x axis
y' = (x + xy^2)/4y
The Philippine Institute of Civil Engineers is planning to construct its own building. Two proposals are being considered:
(a) The construction of the building now to cost PhP 400,000.00
(b) The construction of a smaller building now, to cost PhP 300,000.00 and at the end of 5 years, an extension to be added to cost PhP 200,000.00
Which proposal is more economical if interest is 20%, depreciation is disregarded and by how much?
dx-(1+2xtany)dy=0
Please help me to solve that
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