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?
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...