FactChecker's latest activity
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FactChecker reacted to wrobel's post in the thread High School Can anyone deeply understand relativity? with
Like.
The whole point is what is meant by the word 'understand'. For example, any qualified mathematician can understand the theory of relativity. -
FactChecker reacted to PeterDonis's post in the thread Undergrad Photons vs Gravitons with
Informative.
Classically, fhe field equations for light and gravity are similar, yes; both of them have the basic form of a differential equation... -
FactChecker reacted to Ben vdP's post in the thread High School Why simplifying this function generates different outputs for same input? with Like.
As already mentioned in other posts the first function is not defined for the value 2. So they aren't entirely the same functions. But...
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FactChecker reacted to DaveC426913's post in the thread Stargazing Falcon 9 predicted lunar impact with Informative.
https://www.cbc.ca/news/science/falcon9-rocket-moon-impact-9.7290981 "You need to be taking an image every tenth, hundredth of a...
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FactChecker replied to the thread Undergrad Momentum measurement and uncertainty.Yes.
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FactChecker reacted to PeterDonis's post in the thread Undergrad Momentum measurement and uncertainty with Like.
What do you mean by "sample" here? What I described was preparing a large number of particles in the same state, and measuring the...
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FactChecker reacted to PeterDonis's post in the thread Undergrad Momentum measurement and uncertainty with Like.
What I meant was, we have a large number of results of momentum measurements on the particles that were prepared as I described, and we...
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FactChecker replied to the thread Undergrad Momentum measurement and uncertainty.Thanks. The terminology is tricky. That is the expected value for a single sample from that distribution. That is not the same as the...
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FactChecker replied to the thread Undergrad Momentum measurement and uncertainty."do statistics" is vague. If you determine the variance of the single random momentum value of a single sample (possibly using a large...
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FactChecker replied to the thread Undergrad Momentum measurement and uncertainty.Do you mean the sample variance of the sample distribution of a large number of measurement data, or the variance of the sample average...
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FactChecker replied to the thread Undergrad Momentum measurement and uncertainty.That sounds wrong or unclear. The average of many may have a very small uncertainty, while the uncertainty (variance/spread) of the...
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FactChecker replied to the thread High School Why simplifying this function generates different outputs for same input?.Correct simplification includes keeping track of where the original function was undefined.
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FactChecker reacted to Dale's post in the thread High School Why simplifying this function generates different outputs for same input? with Like.
It is forbidden specifically at ##x=2##. Elsewhere it is not forbidden.
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FactChecker reacted to gen x's post in the thread High School Why simplifying this function generates different outputs for same input? with Like.
This function ##f(x) = \frac{x^2 - 4}{x - 2}## when simplify become ##f(x) = x + 2## . If I enter ##x=2## in the first expression I...
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FactChecker reacted to Mark44's post in the thread High School Why simplifying this function generates different outputs for same input? with Like.
The two functions are identical except at the point (2, 4). The graph of ##f(x) = \frac{x^2 - 4}{x - 2}## can be thought of as a...