Recent content by siukwok

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    How to Locate the Center of Gravity

    Thank you so much! =)
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    How to Locate the Center of Gravity

    Hi HallsofIvy, Thanks for ur swift reply. However, i probably need some examples to get a better idea of how it is done. I have sketched an object made up of 2 cuboids as attached. The one on top is of 50x70x55 mm^3 and the one below is 100x150x40 mm^3. Say the density for the cuboid on top...
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    How to Locate the Center of Gravity

    Hi, I have some questions regarding on the locating of the center of gravity. I have read some txtbk regarding on finding the COG for structure/element that is homogeneous. Therefore, the COG will conincide with the centroid of the the volume. Am i right to say that homogeneous...
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    Welding and some of the terms which i

    Dear all, i need help in finding out the terms below. Tried goggle it but fail to really understand them. Anyone can help? thanks! 1. Undercooling in welds 2. Quick solidification 3. Martensite, austenite, pearlite, ferrite phase for steels 4. Phase diagram for steels 5. Difference...
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    How to calculate the angle of water in a moving beaker

    Hi, i don't think the solution below is correct. But i managed to get an answer which is within my desired range. Please take a look. Assumptions: Fluid is static Gradient P = acceleration dP/dz= -gρ P = -gρz+c dP/dx= a_x ρ=Fρ/m P = a_x ρx+c_1 Making use of the air flow...
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    How to calculate the angle of water in a moving beaker

    hi masterx, thanks for your reply. however i still don't quite understand how to get the slope. In your reply, you assumed that grad of P = acceleration. What is P? also, a*rho=F/m. a is acceleration? i though a = f/m? for the 2 eqns i obtained, must i set boundary conditions to find the 2...
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    How to calculate the angle of water in a moving beaker

    How to calculate the angle of water in a moving beaker? Say the beaker is moving to the right direction. The water inside the beaker will be tilted to the left. An angle will be formed and how am i supposed to calculate the angle? Assumed parameters: F = force applied to move the beaker...
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