That's what I thought, but it is much easier to oxidize iron than either water or hydroxide according to the values I found... Why do I not get any iron hydroxide?
I've got a question that is bugging me
If I have a concentrated sodium hydroxide solution and electrolyze it with iron electrodes, some of the possible reactions at the positive electrode are
2H2O -> O2 + 4H++4e-. Eo = -1.23 V
4OH- -> O2 + 2H2O + 4e-. Eo = -0.40 V
Fe -> Fe2+ + 2e-. Eo = 0.44...
Say I have a situation like the image.
I have a potentially complex object with moment of inertia I about its center of mass, mass M, velocity v and position r with respect to P. It is rotating with angular velocity ω about its center of mass
What is the angular momentum about point P? I...
The universal law of gravitation is:
F_g = \frac{mMG}{r^2}
Where G = 6.674*10^{-11} \frac{m^3}{kg*s^2}
The average mass density of the earth is 5.515 g/cm^3 (According to Wikipedia),
so the acceleration due to gravity based on a planet with Earth's density and radius r is a =...
You need to use Faraday's law to properly understand inductors.
What is often misunderstood about inductors is that there is no voltage drop across an ideal inductor, it imposes an EMF in the opposite direction. Kirchhoff's law does not hold for inductors.
What does hold is:
\oint_C...
You could approximate what would happen to an accurate degree. You would need to know the mass distribution of the horseshoe and the friction coefficients between the shoe and the stake, but a computer simulation would be possible.
Ok, I see.
Easy mistake:
x = \frac{4mg}{k}
It seems everything else I did was unnecessary, I don't need to deal with the potential energy.
So evaluating the integral:
\int_{\frac{-4mg}{k}}^{d} (-kx - mg) dx = 0
Yields:
d =\frac{2mg}{k}
M \lt 2m
This makes sense, Thanks!
I have been looking into how antennas work, and I have found that antennas of half wave-length are apparently optimal, but I don't understand why. If anybody could explain why this is, I would appreciate it. Thanks! (I do have an understanding of electromagnetic waves)
This is not a homework/coursework problem, but I came across it and wanted to check my answer.
Homework Statement
As in the diagram, there are two blocks of mass M and m. The mass m is suspended above M by a spring of spring constant k.
Initially, the block m is pushed down with a force...