Calculating Neutron Binding Energy in 13-C

AI Thread Summary
The discussion focuses on calculating the binding energy of a neutron in Carbon-13 (13-C). The user initially attempts to compute the binding energy using the mass defect formula and conversion factors but arrives at incorrect values. After some confusion regarding the notation for Carbon-13, the user resolves the issue independently. The final calculations indicate a binding energy of approximately 97.2 MeV, leading to a binding energy per neutron of 7.49 MeV. The thread highlights the importance of clarity in notation and the correct application of formulas in nuclear physics calculations.
MeKnos
Messages
16
Reaction score
0

Homework Statement


Calculate the binding energy of a neutron in 13-C.


Homework Equations


mass defect= (Z*mp) + (N*mn) - (mc13)
B = mass defect * conversion factor
B/(Z+N) = Binding Energy per Neutron

I wasn't given any values for the numbers, so I wiki'd them.


The Attempt at a Solution



B= 6(1.0078) + 7(1.0087) - 13.0033 = .1044
B= .1044 * (931.49) = 97.2 MeV
B/13 = 7.49 MeV

thats wrong, and so is B/7=13.89 MeV
 
Physics news on Phys.org
Anyone?
 
What do you mean by13-C?
 
Carbon 13
 
nevermind, i figured it out by myself
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top