Recent content by german1234

Hi If I was to heat a steel rod that is brittle...then clamp it at both ends and allow it to cool to a certain lower temperature at which it breaks, how would I go about calculating the breaking stress of the steel. [ I know value of E and alpha] Thanks for any help you supply.

Is the 0.75mm the figure i need to use for the iron?

thanks, I don't know what the original thickness of the iron is, so i can't figure out by how much it expands

Homework Statement An 80mm aluminium alloy piston fits into a cast iron cylinder with a uniform radial clearance of 0.75mm at 15C temp.the piston and cylinder reach 120C. 1. Determine radial clearance at 120C 2.what is diametral clearance 120C 3.What is change in cross sectional area of...

Thanks for all the help.Yes, it was a typo...i know it should be 0.1 :)

Homework Statement A load of 200kg rests on a horizontal plane.A horizontal force of 196N is needed to overcome friction.Find the coefficient of friction Homework Equations F(gravity)=W=mg F(friction)= (mu)N The Attempt at a Solution W=mg W=200(9.8)=1960N This then is the...

Homework Statement Airport runway designing: (i)lowest acceleration rate of any plane is likely to be 3m/s^2.Take off speed for this airplane will be 65m/s.what is minimum allowed length of runway? (ii)If airplane accelerates down runway at 3.2m/s^ for 32.8 seconds until it lifts...

Thank you so much, Doc Al

Homework Statement A car is traveeling at 50km/h.It has to stop over distance of 100m. Find (a) constant rate of deceleration neede (b)time taken to stop Homework Equations v^2=u^2+2as v=u+at The Attempt at a Solution (a) 50km/hr= 13.889m/s=u v=0 s=100m a= need to...