Recent content by ronpaulkid

Apparently it was a Russian who volunteered back during the Cold War.

http://i.imgur.com/6lqaR.jpg

Homework Statement I am given an equation, say (239/94)Pu-->(110/53)Fe+(125/41)Nb+4neutrons I am asked to calculate the relativistic energy so I do that. Q=m(left)-m(right)c^2 I know that m(left)=m(Pu) I know that m(right)=m(110Fe)+m(125Nb)+4m(neutron) (i put the answer into MeV for...

Homework Statement The activity of a sample of (35/16)Sulfur with a t(1/2) of (7.55*10^6 s) is 3.52*10^5 decays per second. What is the mass of the sample? Homework Equations N=Noe^-lambda*t lambda=.693/(t1/2) No/DeltaT=lambda*N The Attempt at a Solution My attempt was to...

Homework Statement How accurately can the position of a 2.70keV electron be measured assuming its energy is known to 3.00%? The answer is (deltaX)>=? Homework Equations (deltaX)(deltaP)>=h/2pi (deltaX)(deltaE)>=h/2pi The Attempt at a Solution My attempt at this solution...

Homework Statement An 2000kg car is traveling with a speed of (22 (+/-) 0.25) m/s. With what maximum accuracy can its position be determined? Homework Equations (deltaX)(deltaP)>=h/2pi The Attempt at a Solution My attempt was solving for deltaX in the above equation. I used...

--------HF+H20=F-+H30 I-----.158---0-----0-----0 C-----(-.158)--0---.158---0 E------x-------0------(-x)----0 Ka=x^2/[x-.158] Kb=[x-.158]/x^2 Is this close to how it looks?

hey, I am new here. did i do something wrong?

Homework Statement Calculating concentration of F- for .158M of HF? Calculate the equilibrium concentration of F- for .158M of HF in the reaction below.? HF+H20=H30+F- The Kb is 6.66*10-4 Homework Equations Kw=Ka*Kb Ka=[H+][A-]/[HA] The Attempt at a Solution I figured...