Recent content by cantgetno

ok using the equations i end up with the quadratic: pB^2 + 0.01pB-0.01=0 so pB=0.095atm so pA=0.905atm and i can work out for the other atmthanks

because there's 2 moles of it? i thought that was right, my bad. pA+pB=1atm that right? would i be right to use a simlt equ then?

surely it would be pA+2pB=1atm ? and I am not very sure how to solve in terms of partial pressures would i have kp= pB^2 / pA so 0.01 = pB^2 / pA I've tried using a simultaneous equation with pA+2pB=1 and just end up with rubbish

Homework Statement The Equilibrium constant for A(g) -> 2B(g) is 1x10^-2 at 1000k. Calculate the fraction on A which is dissociated at 1000k if the total pressure is 1 atm 10^-3 atm Homework Equations PV=nRT B^2 / A = Ke (1x10^-2) The Attempt at a Solution for A...

ha sorry ^^ thanks for the help

ok using: a(tan)=r (dw/dt) 0.4=0.255 (a) a= 15.68 rad/s^2 Sorry i wasnt thinking properly thanks lots

ummm a=dw / dt ? a(tan)=r (dw/dt) also but how do i do dw/dt when i don't have an equation?

v=rw 0.02m/s=r x 0.785 rad/s r = 0.0255 m d=0.051 m (correct) a = v^2 / r = w^2 r a = 0.016 m/s^2 but that's only that radial actually... is that what i want?

oh crap i put 1/2 l m^2 ... I am an idiot thanks anyway

oh its around the middle so that makes the mass in the middle mass x 0 metres? m=mass

Homework Statement Small blocks, each with mass m, are clamped at the ends and at the center of a rod of length L and negligible mass. Find the formula for I Homework Equations I=MR^2 The Attempt at a Solution I=m(0.5 L)^2 + m(0.5 L)^2 I=2(0.5L)^2 m I=0.5L^2 m am i right?

Homework Statement You are to design a rotating cylindrical axle to lift 800N buckets of cement from the ground to a rooftop 78.0m above the ground. The buckets will be attached to a hook on the free end of a cable that wraps around the rim of the axle; as the axle turns, the buckets will...

thanks 10.27 kg m^2 is the answer :)

bingo thanks lots and lots

I= 0.5 m r^2 I = 0.5 x 25.8 x 39^2 = 1920.9 And for the other: I= 0.5 m(r1^2 + r2^2) I=0.5 x 26.465 x (39^2 +69^2) = 83126.6 do i add these together? giving 102747.465 ?