How Did Scientists Determine Avogadro's Number?

  • Thread starter Thread starter John Galaor
  • Start date Start date
AI Thread Summary
The discussion centers on the inquiry into the historical reasoning and methods scientists used to determine Avogadro's number. The original poster expresses curiosity about the process rather than the definition of the number itself. A link to a Wikipedia article is provided, which outlines various measurement methods. The poster acknowledges the information and indicates a willingness to share their own approach to understanding it. The conversation highlights the complexity and historical significance of arriving at this fundamental constant in chemistry.
John Galaor
Messages
2
Reaction score
0
I never had found the reasoning process by which scientists arrived at that precise Avogadro's number. I suppose it was a slow and painful process.
So, anyone knows the path they followed to arrive to this precise number?

I don't want anyone to explain me the meaning of that number.
I know this well already.
John Galaor
.
 
Physics news on Phys.org
Thank you very much. I will tell you how I manage with it.
John Galaor
.
 
Thread 'Gauss' law seems to imply instantaneous electric field propagation'

Thread 'Gauss' law seems to imply instantaneous electric field propagation'

Imagine a charged sphere at the origin connected through an open switch to a vertical grounded wire. We wish to find an expression for the horizontal component of the electric field at a distance ##\mathbf{r}## from the sphere as it discharges. By using the Lorenz gauge condition: $$\nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial \phi}{\partial t}=0\tag{1}$$ we find the following retarded solutions to the Maxwell equations If we assume that...
View full post »

Thread 'Do electron density waves accompany EM waves in coaxial cables?'

Maxwell’s equations imply the following wave equation for the electric field $$\nabla^2\mathbf{E}-\frac{1}{c^2}\frac{\partial^2\mathbf{E}}{\partial t^2} = \frac{1}{\varepsilon_0}\nabla\rho+\mu_0\frac{\partial\mathbf J}{\partial t}.\tag{1}$$ I wonder if eqn.##(1)## can be split into the following transverse part $$\nabla^2\mathbf{E}_T-\frac{1}{c^2}\frac{\partial^2\mathbf{E}_T}{\partial t^2} = \mu_0\frac{\partial\mathbf{J}_T}{\partial t}\tag{2}$$ and longitudinal part...
View full post »
Thread 'Recovering Hamilton's Equations from Poisson brackets'

Thread 'Recovering Hamilton's Equations from Poisson brackets'

The issue : Let me start by copying and pasting the relevant passage from the text, thanks to modern day methods of computing. The trouble is, in equation (4.79), it completely ignores the partial derivative of ##q_i## with respect to time, i.e. it puts ##\partial q_i/\partial t=0##. But ##q_i## is a dynamical variable of ##t##, or ##q_i(t)##. In the derivation of Hamilton's equations from the Hamiltonian, viz. ##H = p_i \dot q_i-L##, nowhere did we assume that ##\partial q_i/\partial...
View full post »

Similar threads

I Are Real Numbers Essential in Scientific Measurements and Models?
2
Replies
85
Views
8K
Dalton's atomic theory, Avogadro, and caloric theory
Replies
4
Views
2K
I How Did 1900s Physicists Misjudge the Completeness of Physics?
Replies
2
Views
1K
How does one convert a decimal float to binary using the multiply by 2 method?
Replies
4
Views
2K
B Implicit error margins based on significant figures
Replies
18
Views
2K
I Solving a momentum problem where masses change after the collision
Replies
35
Views
3K
Small numbers, large numbers, and very large numbers
Replies
7
Views
5K
Number of bits required for floating point representation
Replies
4
Views
2K
Estimating Avogadro's Number Using Surface Tension Experiment
Replies
3
Views
5K
B Estimates — True Size of the Universe?
Replies
17
Views
3K

Hot Threads

Recent Insights

Back
Top