Recent content by ar202

ps thank you for your reply, I've run it through various values and its jumping from 9 to 30GPa. so i think ill take the 30 and run!

The smalles load value i have is 0.33kN and a deflection of 0.011mm which still gives me a pretty low value of E... 9GPa i think.

I've got a beam of Length 500mm under third point loading. width = 100mm depth=100mm Force at rupture is 6.627kN change in length =0.000019m = 0.019mm can someone help me with the Youngs modulus please i'm getting 6.87 GPa... which seems a bit low for concrete? Although possible...

Homework Statement ok so not sure I'm in the right place but worth asking! I have a beam which is fixed and then pinned in two places. Using macaulays method, am i supposed to work out the vertical reaction at both pins left of the cut? Homework Equations Here's a terrible drawing of...

Pressure at 40m = 1000(p) x 9.81(g) x 40(h) + Atmospheric pressure (100'000) = 492800 Pressure at surface = 100'000 Pa ...

Have ended up with the volume of the bubble at surface = 2.2L anyone think this is correct?

Homework Statement A 12 litre gas bottle is initially charged with air to 232 BAR at 30 C. What will be the new pressure in the bottle once it has cooled to 8 C? A diver breathes from the gas bottle above, is working at a depth of 40m, and at a temperature of 8 C. If the diver exhales...

Yeah you're right, i didn't factor in surface pressure. doh!

Homework Statement A steel strip of breadth 50 mm and depth 3 mm needs to be bent around a drum of diameter 4 m. What bending moment is required and what will be the maximum stress produced? The modulus of elasticity of the steel is 210 GPa Homework Equations \frac{M}{I}...

1 x 106 / 2.1 x 1011 = 4.76 x 10-4 ...?

Stress/strain+general bending equation... Homework Statement A steel strip is to be bent around a drum of radius 1m. What is the maximum thickness of strip that can be bent in this way if the stress in the strip is not to exceed 100 MPa. The steel has a modulus of elasticity of 210 GPa...

turns out i got this WRONG! any thoughts?!

ok. thanks for the help dude

ok I am kinda struggling with the latex code... what a ballache! apologies if this is confusing z=1/2√z & z=x4+1 = 4x3 then i get 4x3/2√x4+1 how does that look...?

ok cool, because i was doing some work on products and quotients and then got hit with these so was a little thrown. thanks for your help! ps Any help with (B) :p