Questions tagged [data]
The data tag has no usage guidance.
168
questions
0
votes
0
answers
30
views
Optical Properties of Heavily Doped Silicon in the Visible and Near Infrared
I am looking for a model of the changes in the complex refractive index of doped Silicon based on the doping level and type in the visible and near-infrared wavelengths (400-1000 nm). I have seen ...
1
vote
1
answer
130
views
Up-to-date values of Yukawa couplings (2023)
Where can I find the most recent values for the Yukawa couplings in 2023? I currently have access to the values from 2011, but I guess precision has improved over the last decade in measurements.
Edit:...
- 359
0
votes
1
answer
19
views
Large table of pairwise friction values?
Small table of pairwise friction coefficients (i.e., "rubber vs concrete", "leather vs oak") exist online:
https://www.engineeringtoolbox.com/friction-coefficients-d_778.html
...
4
votes
2
answers
110
views
Where can I find interpolation formulas or tabulated data for phase diagram(s)?
In order to program it, where can I find accurate representations of the water (or others - e.g.: CO2) phase diagrams, in the form of mathematical functions or in the form of interpolable tabulated ...
0
votes
1
answer
45
views
Seeking Empirical Data Sources Relevant for an Alternative Gravity Theory [closed]
I am currently developing an alternative theory of gravity and am in need of empirical data sources that could assist in evaluating the potential validity and implications of this theory. This model, ...
0
votes
1
answer
31
views
Where can you find the velocity dispersions of globular clusters?
I'm trying to use the Virial theorem to determine the mass of the M5 cluster and I need the velocity dispersion to calculate this. Does anyone know where I can find a table with these velocity ...
0
votes
0
answers
40
views
Evaporation rate of Miscible Liquids
I am currently on a small individual research project researching the evaporation rate of miscible liquids and have some questions about the data that I have received and how to interpret it. The ...
2
votes
1
answer
59
views
Is this scientifically useful exoplanet transit data? [closed]
For a physics project, I am trying to derive properties of exoplanets through their transit light curve. I tried to get the data myself, on the known exoplanet Qatar-6b.
My Equipment:
8" Newt. ...
0
votes
1
answer
22
views
Can the damping coefficient of a pendulum be predicted given physical variables?
I'm aware you're able to calculate the coefficient of damping, $b$, given a set of amplitudes over time through $$\ln(\theta/\theta_0) = -bt/2$$ However, is there any way to get $b$ without empirical ...
0
votes
0
answers
15
views
Where does the databases for isotope fingerprints (such as those used in gamma specs) come from?
Using a gamma spec for example, compares energy data and intensity, against known databases to try to find a match, and uses this to identify the isotopes detected.
What data are these databases built ...
- 221
-3
votes
1
answer
45
views
Can we say that for everything in our universe to exhibit a behaviour, it should have the capability to process information?v(details below) [closed]
Take the simple case of water molecules.. you freeze them, it turns into ice.. at around 100° it vaporizes.
For each and every reaction in this example, the molecule needs to react to heat, for it to ...
- 11
0
votes
1
answer
49
views
Where can I find datasets for all confirmed exoplanets, terrestrial exoplanets, and Super-Earth exoplanets?
"The NASA Exoplanet Archive" (https://exoplanetarchive.ipac.caltech.edu/) implies that there are 5,197 confirmed exoplanets. The "5,197 Confirmed Planets 11/02/2022" link leads to ...
0
votes
1
answer
71
views
UV-absorption capability of air
I am looking for an absorption chart for UV light with a wavelength of around 250 nm in air (ambient, no specific preparation). How much of a beam of this light would be absorbed per meter of path ...
0
votes
1
answer
99
views
Is there a downloadable spreadsheet of all known subatomic particles?
Is this Wiki page complete in its list of subatomic particles? Looking for a CSV or spreadsheet I can download and easily translate into code of all the possible subatomic particles. This page says &...
- 2,108
4
votes
2
answers
854
views
Rules of significant figures, precision, and uncertainty
In the physical sciences (which are physics, chemistry, astronomy, materials science, etc.), we learned that the uncertainty is +/- the smallest unit (which is 1) of the last significant figure if the ...
0
votes
1
answer
33
views
Where can I find photon absorption cross-sections for various isotopes?
I am looking for absorption cross-sections for photons. Usually, I am dealing with neutron absorption where I utilize https://www.nndc.bnl.gov/endf/ for my data. This is a really handy website that ...
0
votes
2
answers
35
views
Calculating error on manually chosen estimated fit
I understand that this should be basic knowledge, but despite searching all over the internet, I could not pinpoint the answer to this.
Suppose I have data, and it can be linearised to a basic y=mx+c ...
- 1
1
vote
1
answer
71
views
Where can I find redshift data?
Is there any database for redshift data of individual galaxies and stars for a long period of time?
0
votes
1
answer
41
views
Is there data for natural background radiation measurement?
I am looking for raw data of alpha/beta/gamma particles natural background long-term measurement (preferably day by day or second by second for at least a few weeks), but cannot find any. I would be ...
- 39
-1
votes
1
answer
84
views
Prediction of constants with the standard model
I am trying to understand how the standard model predicts constants.
Does it also predict fundamental constants such as the mass of the electron?
And when looking at the result of the $g-2$ experiment,...
- 85
1
vote
1
answer
95
views
What is the value of the exchange field in the 3d ferromagnets ($\rm Ni, Fe, Co$)?
I have been trying to find the values of the exchange field for Ni, Co and Fe. This website mentions, "Exchange forces are very large, equivalent to a field on the order of 1000 Tesla" https:...
- 11
0
votes
2
answers
94
views
Public data to practice data analysis skills
Apologies if this is the wrong place to ask this, but I am currently trying to brush up on my data analysis skill in python as I am applying to data science jobs. I am trying to find some data that I ...
1
vote
2
answers
482
views
How do I get the total acceleration from 3 axes, in negative?
For a project, I'm working with acceleration data recorded by triaxial accelerometers. This means that I have accelerations in the x, y, and z axes. I found the almost exact same question from a few ...
- 11
1
vote
1
answer
106
views
Availability of dataset from "Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres"?
I am looking for the most-raw data from the (in)famous Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres experiment. I would like to try repeating their ...
2
votes
1
answer
118
views
How to obtain position data from acceleration without forward euler?
I am doing a investigation into the Wilberforce Pendulum and in order to find the position and rotation at any time I have attached my phone onto the pendulum in order to use Phyphox, a app that finds ...
- 23
1
vote
2
answers
68
views
What Data Set(s) Would Be Best For Head-To-Head Unified Field Theory Model Selection?
I'm seriously considering establishing a prize for unified field theories in-line with my history of prize awards, such as the fusion legislation I drafted with a cofoudner of the AEC's program, the ...
- 1,295
33
votes
5
answers
8k
views
How is data transferred between devices?
If you send a text from your phone to your friend, do electrons move from your phone to your friend's phone? How is text transferred (physics wise)? I am a programmer and I want to know how it is ...
- 447
2
votes
1
answer
137
views
Is there a Maximum Data Density of a Physical Volume?
Is there an established or proven relationship concerning how much data can fit in a given volume of space / spacetime?
- 455
0
votes
1
answer
56
views
Am I applying this vector-based equation correctly to my dataset? [closed]
A coworker and I need to perform what is probably a simple calculation with our data so that we can calculate something else. However, our vector calculus skills are rusty and we don't know if we ...
- 125
0
votes
0
answers
57
views
How many bits of storage would be required if we are in a simulation?
The answers here didn't really address what I was looking for (How many bits are needed to simulate the universe?), so...
If we are in a simulation, can we presume the simulation only needs to be ...
user294413
1
vote
1
answer
74
views
How exactly does magnetism rip data from things?
I once read in a book that if a magnetar were to pass by the earth that it would rip the data from every single credit card on the planet's face. I'm not entirely sure if I'm in the right place for ...
1
vote
0
answers
47
views
What is the theoretical upper limit, if any, to the quantity of information bits that can be encoded within a given volume of space? [duplicate]
By encoding I mean representing bits of information as some form of mass-energy that can be, at some time in the future, decoded back into the original information bits without loss. This does not ...
- 113
1
vote
0
answers
21
views
Determining loss of intensity in a slow neutron beam after passing through a metal plate [duplicate]
I am looking at a question dealing with the loss of intensity of a beam of slow neutrons with initial intensity $I_0 = 5 * 10^5$ N/sec as it passes through an aluminum plate that is $3$ cm thick.
I ...
0
votes
1
answer
71
views
Is there any website or method to calculate the refractive index of gases like $\rm CO_2$ in the mid IR?
I want to know the complex refractive index of some gases like CO2, CH4, C2H6 .. etc in the mid infrared.
Is there any website, software or a method to know them?
0
votes
0
answers
272
views
Where can I find the true anomaly of the planets on Jan 1st 2000?
I am trying to code a simulation of the solar system. At present, all the orbits seem correct but I'm placing the planets at their respective periapses at the start of the simulation so the relative ...
0
votes
2
answers
69
views
How to get spectral data of Sun?
I am doing project in blackbody radiation and i am about to analyse the spectral data of the incandescent lamp, hot metal, Sun and Sirius A. So i can find the displacement of the peak of curves using ...
- 26
1
vote
1
answer
335
views
Rate of evaporation of water vs temperature. Where can I find data?
The story
If there is an easily understandable problem that fascinates me compare to apparently how hard it is to model and solve accurately, and how little it has been studied, the time to cool down ...
- 253
2
votes
0
answers
72
views
Calculate orbital speed of object around earth (SpaceX data)
I am just reading SpaceX rocket data satisfies elementary Hohmann transfer formula, a paper of how to use SpaceX telemetry data in educational physics.
In particular the paper contains the following ...
- 1,652
1
vote
2
answers
77
views
How are the locations of solar system planets expressed in their orbits?
and where can I find the data about the locations of the solar system planets during their entire year?
I would like to find the data on the orbits of solar system plantes. Also I would like to know ...
0
votes
0
answers
30
views
Research on exoplanets using available data from TESS
I am a high school student who is proposing research on exoplanets for my junior research project, I have several questions:
I have seen studies where researchers survey star systems and then find ...
0
votes
1
answer
39
views
Speed of field and data in wire
The speed of field in wire is near the speed of light (speed of field not electron) so why speed of data is in MBPS, I mean why a byte dose not transport with light speed (field speed).
- 113
0
votes
1
answer
21
views
Pseudo-potential form factors for gold
Can anyone suggest a reference in which I can find the Fourier coefficients of the pseudopotential of gold?
I cannot find them anywhere in literature.
I need them to compute the role of plasmon decay ...
0
votes
1
answer
64
views
Is there a standard distance/z data set for cosmology given new measurements?
I've seen this data set in a few places.
Found here: https://lco.global/spacebook/light/redshift/
Do the measurements from SH0ES and Planck that cause the Hubble tension alter this table?
I can find ...
- 767
-1
votes
2
answers
85
views
Single galactic proof of Dark matter?
I've heard tell that many galaxies have visible mass profiles which do not match up to a predicted Gravitationally Newtonian velocity distribution. Can anyone here find me an accessible paper of an ...
0
votes
2
answers
130
views
What is the difference between horizontal units and horizontal scale at an oscilloscope?
This is a picture of the data of a given measurement by an oscilloscope. I would like to know what the difference between horizontal units and horizontal scale at an oscilloscope is. I would be so so ...
user277332
0
votes
0
answers
21
views
Is there a tabulated reference for CO$_2$ reactions showing entropy and free energy?
With all the climate change attention I am hoping to find a CO$_2$ reference that can help me find a $\text{CO}_2$ reaction with $\Delta \text{S}^{\circ}$ less than zero, and ideally $\Delta \text{G}^{...
0
votes
1
answer
41
views
Experimental Data for Contact Angles
I am doing some experiments with contact angle of liquids on chrome stainless steel and was wondering if in the literature there is already experimental data for contact angles of different fluids on ...
1
vote
1
answer
44
views
Where can I hear the trapped sounds inside a pulsar?
I have been searching for an audible track of stellar oscillations inside a pulsar, but I don't seem to find what I want. No, I am not asking about the radio waves emitted that have been converted ...
0
votes
1
answer
39
views
What is effective mass of electrons and holes at room temperature of Al${}_{0.52}$In${}_{0.48}$As?
I'm searching for those values, but usually they are given at very low temperatures, usually 77K or 4K. I'm looking mostly for bulk values.
I was thinking of applying Vegard's law to AlAs and InAs... ...
5
votes
2
answers
206
views
Does data compression require energy?
Suppose I have a $C=1TB$ hard drive $H$, filled to the brim with English text. I'd like to compress this.
Suppose the hard drive consists (abstractly) of zeros and ones, and that the number of ones in ...
- 538