How Many Electrons Are Removed from a Charged Copper Ball?

AI Thread Summary
A 3.0mm-diameter copper ball charged to 50nC requires calculating the fraction of electrons removed. The density of copper is 8900kg/m^3, and the volume of the ball is calculated using the formula for the volume of a sphere. The user initially calculated the number of electrons in the ball as approximately 3.125 x 10^11 but encountered an error in their final answer of 5.682 x 10^-16. Clarification is sought on the calculations to identify where the mistake occurred. Accurate calculations are essential for determining the fraction of electrons removed from the charged copper ball.
Mek8388
Messages
2
Reaction score
0

Homework Statement


A 3.0mm-diameter copper ball is charged to 50nC.What fraction of its electrons have been removed? The density of copper is 8900kgm^3.


Homework Equations



d=m/v; v=4/3* pi r^3

The Attempt at a Solution



I worked through it and got 5.682 E -16, but that answer was wrong. I first found the number of electrons were in it (3.125 E 11). I then found the volume (1.414 E -8), and I think that's where I got stuck after that.
 
Physics news on Phys.org
So what did you try to do after that?
 
Welcome to Physics Forums.
Mek8388 said:

The Attempt at a Solution



I worked through it and got 5.682 E -16, but that answer was wrong. I first found the number of electrons were in it (3.125 E 11). I then found the volume (1.414 E -8), and I think that's where I got stuck after that.
Can you show the work you did to get those numbers? It would be easier to help you if you do that.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged 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

Electric force due to a moving charge
Replies
7
Views
2K
What is the Fraction of Electrons Removed from a Charged Ball of Copper?
Replies
2
Views
12K
Change in the Electric Field Due to a Copper Wire Being Inserted
Replies
14
Views
5K
Why are the electrostatic field lines normal to a charged conductor?
Replies
10
Views
1K
I Thought I Understood Gauss' Law (Sheets)
Replies
26
Views
2K
How Many Electrons Are Removed from a Charged Copper Ball?
Replies
3
Views
6K
How Do You Calculate Electric Energy Density Near a Copper Wire?
Replies
1
Views
2K
Finding Charge & Tension of a Suspended Cork Ball
Replies
3
Views
4K
Nichrome and Copper Circuit w/ Electron Mobility
Replies
31
Views
8K
Forces between charged particles
Replies
1
Views
5K

Hot Threads

Recent Insights

Back
Top