I understand why the standard deviation of the mean is related to the standard deviation by a factor of √(n). I have no issue with this.
What I don't understand is how you can estimate the standard deviation, by taking the square root of the expectation value. That is where my confusion lies...
In Frank Attix's book on Radialogical Physics
Equation 1.2a reads
σ = √(E) ≈ √(μ) σ= standard deviation of a single random measurement
Where E is the expecation value of a stochastic process which approaches μ (μ is the average of measured values) as the number of measured values...
I've been asked to teach an electrical engineering course, due to lack of EE people at my college.
I've been running through Mesh , nodal analysis etc.
Its seems like these are just variations of using kirchhoffs voltage and current continuity equations. It seems pointless to me, I've...
The 1st statement written was
"Work done on a system is defined as the change in Kinetic Energy (KE) of that system. While The total energy of a system is the potential energy (PE) plus the kinetic energy, E=PE+KE."
There isn't anything wrong with this, one can read that is that the NET...
I think you are not interpreting what was initially said or meant.
If you want to correct the statement, it would be that the NET WORK done on a body is equal to its change in kinetic energy. I think that was implied.
Where the NET work done is the sum of all the works done on the body. For...
OMG you are completely wrong...
Please do not comment if you have no clue what your talking about.
The doppler effect only affects the frequency perceived for a moving source or a moving listener. It has nothing to do with a static pair of headphones.
Your claims are completely...
When you try to listen to music through headphones you can reasonably hear the low end (lower frequencies). When you take the headphones off of your head and place them far enough away you only hear a tinny sound.
When you are outside of a loud rock concert, maybe 1500ft from the source, you...
I have a masters in physics and I had an extremely hard time finding a low paying lecturer job. I had to leave my Phd program due to lack of research support / TA support. It was very stressful and I remember that I was offered a few positions before attending grad school making 30 to 60% more...
I see your point and I believe that it is fully explained when I say that the intrinsic uncertainty is a bound for the systematic error of the device.
For instance a particular digital caliper's manufacturers uncertainty is given as 0.002cm.
This means that 0.002cm = x +y. Where x will...
And I'm sorry you can not refute the facts I've presented.
And If I'm wrong I have to carry that message to all the colleges that I teach for, for not one follows the prescription you are describing.
I disagree...
"Repeatability is very similar to Linearity. Repeatability refers to a scale's ability to consistently deliver the same weight reading for a given mass, and to return to a zero reading after each weighing cycle. You can test this by repeatedly weighing the same object...
But how do you know that this is referring to the intrinsic error (or approximate error by least count) given by the manufaturer.
Every device has a systematic error, that is true. Every error introduced by a device will be systematic. But that does not mean that the uncertainty or error quoted...
The least count is the precision of the tool, its the smallest amount that a tool can discern the difference between.For instance we might have an electronic balance that has a precision of 0.01g that means it can tell the difference (resolve) between a mass that is 1.15g and 1.16 grams. However...
That is vague, "what "is a systematic error, I would like to see the entire paragraph.
Also if what ur saying is true, then the entire undergraduate physics community is wrong, because evyery
Institution propagates these in quadrature which means there not entirely systematic but have a...