Coulomb's Law Calculation: Electric Force between Electron and Potassium Nucleus

  • Thread starter Thread starter themadhatter1
  • Start date Start date
  • Tags Tags
    Coulomb's law Law
AI Thread Summary
The discussion focuses on calculating the electric force between an electron and a potassium nucleus using Coulomb's Law. The formula applied is Felectric = Kc[(q1)(q2)/r^2], with values substituted for the charges and distance. The calculated electric force is -1.62 X 10^-8 N, indicating an attractive force due to opposite charges. Participants confirm the calculation is correct but remind to include units in the final answer. The importance of proper unit notation in physics calculations is emphasized.
themadhatter1
Messages
139
Reaction score
0

Homework Statement


An electron is separated from a potassium nucleus (charge 19e) by a distance of 5.2 X 10-10m. what is the electric force between these particles? (e = 1.60 X 10-19C, Kc= 8.99 X 109 N*m2/C2)

Homework Equations



Felectric= Kc[(q1)(q2)/r2]

The Attempt at a Solution



Felectric= 8.99 X 109[(19e)(-1.6 X 10-19)/(5.2 X 10-10)2]

Felectric= -1.62 X 10-8

Is this correct?
 
Physics news on Phys.org
Yeah looks good, don't forget your units though.
 

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Calculate electric force using Coulomb's law (vector components are the struggle)
Replies
3
Views
1K
Coulomb's Law in 3D: Find Electric Force & Field
Replies
2
Views
3K
Calculating Electrical Force on Alpha Particle Near Gold Nucleus
Replies
2
Views
2K
Work, energy, power unit (coulombs)
Replies
2
Views
1K
Three particles, finding Q of one of them (Coulomb's Law)
Replies
3
Views
2K
Coulomb's law vs Electric Field
Replies
12
Views
5K
Calculating Charge and Force Using Coulomb's Law and Trigonometry
Replies
6
Views
8K
Electric Force and Superposition...Help
Replies
8
Views
2K
Coulomb's Law Grade 12 Question -- Net Electric Field affecting a Charge
Replies
18
Views
4K
Electric Charges, Electric Forces and Electric Fields
Replies
8
Views
3K

Hot Threads

Recent Insights

Back
Top