What are the 8 formulas I need to locate in my textbook?

  • Thread starter Thread starter vantz
  • Start date Start date
  • Tags Tags
    Formulas
AI Thread Summary
The discussion focuses on identifying various equations and their applications, particularly in wave dynamics and acoustics. Equation 3 relates to wave speed in terms of wavelength and frequency, while 5 connects angular frequency to ordinary frequency. Equations 2 and 6 describe acoustic harmonics for open and closed tubes, respectively, and are linked to solutions of partial differential equations. Equation 1 appears to be a solution to Laplace's equation, while 7 addresses reflection magnitude and 8 pertains to the thin lens equation. The conversation suggests the need for a comprehensive index of formulas in textbooks for easier reference.
vantz
Messages
13
Reaction score
0
1.
2dm84tf.jpg

2.
2lnk94h.jpg

3.
nya5ia.jpg

4. [PLAIN]http://img176.imageshack.us/img176/7186/34581263.jpg
5. [PLAIN]http://img87.imageshack.us/img87/8069/16289518.jpg [/PLAIN]
6. [PLAIN]http://img291.imageshack.us/img291/5840/49412218.jpg [/PLAIN]
7. [PLAIN]http://img809.imageshack.us/img809/8945/20137696.jpg [/PLAIN]
8. [PLAIN]http://img99.imageshack.us/img99/7555/78954615.jpg
 
Last edited by a moderator:
Physics news on Phys.org
What do you want to know? These are not equations with fancy names.
 
3 is from wave dynamics...I don't know if it has a name, but it describes the speed of a wave in terms of its wavelength and frequency or period.

5 relates angular frequency to ordinary frequency.

2 and 6 describes the acoustic harmonics of a tube...I think 2 describes an open tube, 6 a tube that is closed on one end.
 
2. and 6. do not need to be associated with acoustics, they are very general parts of solutions to that type of partial differential equation. 1 could arise in any number of ways, it looks like the solution to a PDE, like Laplace's equation. 4 and 5 are pretty self explanatory. 7 looks like it describes a reflection magnitude. 8 is a thin lens equation.
 
i'm just trying to locate them in the textbook, so basically i'd like to know which section they belong in

thanks for the help so far

It would be a good idea to have an index of formulas in textbooks
 
Consider an extremely long and perfectly calibrated scale. A car with a mass of 1000 kg is placed on it, and the scale registers this weight accurately. Now, suppose the car begins to move, reaching very high speeds. Neglecting air resistance and rolling friction, if the car attains, for example, a velocity of 500 km/h, will the scale still indicate a weight corresponding to 1000 kg, or will the measured value decrease as a result of the motion? In a second scenario, imagine a person with a...
Scalar and vector potentials in Coulomb gauge Assume Coulomb gauge so that $$\nabla \cdot \mathbf{A}=0.\tag{1}$$ The scalar potential ##\phi## is described by Poisson's equation $$\nabla^2 \phi = -\frac{\rho}{\varepsilon_0}\tag{2}$$ which has the instantaneous general solution given by $$\phi(\mathbf{r},t)=\frac{1}{4\pi\varepsilon_0}\int \frac{\rho(\mathbf{r}',t)}{|\mathbf{r}-\mathbf{r}'|}d^3r'.\tag{3}$$ In Coulomb gauge the vector potential ##\mathbf{A}## is given by...
Thread 'Griffith, Electrodynamics, 4th Edition, Example 4.8. (First part)'
I am reading the Griffith, Electrodynamics book, 4th edition, Example 4.8 and stuck at some statements. It's little bit confused. > Example 4.8. Suppose the entire region below the plane ##z=0## in Fig. 4.28 is filled with uniform linear dielectric material of susceptibility ##\chi_e##. Calculate the force on a point charge ##q## situated a distance ##d## above the origin. Solution : The surface bound charge on the ##xy## plane is of opposite sign to ##q##, so the force will be...

Similar threads

Replies
5
Views
2K
Replies
11
Views
2K
Replies
12
Views
2K
Replies
42
Views
4K
Replies
10
Views
4K
Replies
27
Views
4K
Replies
22
Views
3K
Back
Top