# Questions tagged [wolfram-alpha-queries]

Use this for questions about calling Wolfram Alpha from Mathematica. Questions about Wolfram Alpha itself are off-topic.

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92 views

### Exporting results containing Entities to JSON?

I am looking for a straightforward way to export results from functions like ImageContents, FacialFeatures, and WolframAlpha - symbols that return stuff containing knowledgebase content. Aside from ...
1 vote
52 views

### WolframAlpha XML parsing error

I am using the WolframAlpha command to automated solution sets of homework exercises. Here is an sample usage, although this can happen with many different examples:...
1 vote
80 views

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151 views

### Empty .png figures generated by a function "PlotWithGrid" whereas no problem with Export function

I have an issue about a .wls script that I can't manage to solve for the moment. I execute it with wolframscript interpeter on ...
39 views

### Wolfram script exported from a Mathematica Notebook : errors actually warnings?

I have exported with the following script put at the beginning of my Mathematica notebook : ...
49 views

### How to access the data object returned from a Wolfram query?

I want to access information regarding the population of the world, over the last 10,000 years, and then visualize it with some annotations. In particular case, I want to: grab world population data ...
81 views

### Integral of the Poisson Kernal [closed]

I wish to solve the following definite integral: $\int^{b}_a P_r(\theta-\phi) d\phi$ ,where $P_r(\theta-\phi) = \frac{1-r^2}{1 + r^2 -2r cos(\theta - \phi)}$ is the Poisson kernel. This is something ...
433 views

### Why does MMA fail to find a solution but WA does?

I am looking for $n$, where $$\dfrac{2^{-3 n-2} \pi ^{n+1}}{(n+1)!}<\dfrac{1}{10000000000000000}$$ We can just test values of $n$ and find the smallest $n = 13$, or any $n \gt 13$ or can use ...
1 vote
73 views

### WolframAlpha website calculator powers

Would be surprised if this hasn't asked before. Also, not sure if tag is correct. With my graduation I lost access to the free university Mathematica. Today, I was too lazy to do a simple matrix ...
157 views

### Wolfram Mathematica Code please [closed]

Consider two natural numbers of two-digits, like 46 and 96. They have the property that by exchanging the place of their digits and multiplying the so obtained numbers, we get the same product; i.e., <...
34 views

I have this mathematic problem: (124164a/300b/2360/.85)+(124164a/25b/2360/.85)+(124164a/55b/2360/.85)=3.81=(a/b/2360/.85) And this is the result: a≈87.4514, b≈0.0114422 I payed for WolframAlpha Pro ...
49 views

### Constructing Wolfram Alpha Query for Solar Position

When I use Mathematica calls to WolframAlpha, it clearly knows about the motion of the sun, so I can request the solar declination at any date/time: But I'm having great difficulty crafting a query ...
1 vote
143 views

### Density of water at a given temperature and pressure

In Wolfram|Alpha if I write: density water at 500°C and 100 atm instantly I read: 30.92 kg/m^3 (kilograms per cubic meter) ...
75 views

### Wolfram alpha query works online but not through mathematica?

Bit of a bizarre problem I'm having (well, more a question than a problem). I am trying to solve an integral, which I queried using the online wolfram alpha website. The input and output are ...
1 vote
235 views

### Calculating double integral bounded by domain in Wolfram Alpha Notebook [closed]

If I want to compute Double Integral on a given region(See attached Picture) How can I input this on Wolfram Alpha Notebook
62 views

### How can I show the calculation of the determinant of a matrix step by step? [duplicate]

I would like to emulate what Wolfram Alpha does in Mathematica. Can you help me? ...
71 views

### Engineering materials entity class

Are there any Entity Class like EntityClassList["Mineral"] to get physical properties of "Materials" like steel alloys, polymers, ceramics or ...
2k views

### Convert WolframAlpha output to $\LaTeX$

I am using WolframAlpha app on my iPad and would like to confirm that there is no way to convert its output to $\LaTeX$ form? It would be nice to have this feature so as to copy it to Stack Exchange ...
173 views

### Wolfram|Alpha query doesn't compute answer

I typed == integral (e^cosx)((cosx)^2)(sinx) from x=0 to pi into Mathematica, but it doesn't seem to generate an answer. What did I do wrong? I entered the query ...
133 views

### Plot a sum of vectors using inline free format or wolframalpha. What is the hidden code?

Using Wolframalpha or inline free format you can obtain a nice representation of a sum of vectors. An example is shown below. Whish is the hidden code? (or a code that make the same representation). ...
1 vote
71 views

### General: 2456 is not a valid variable [closed]

... is not a valid variable i dont know whats happend
1 vote
51 views

### How to make this expression?

How to code this expression in WolframAlpha. I am interested in how to code the second sum, because it contains a boolean expression: $$\sum_{i=1}^{100}{\sum_{j>n}}{x_{i}x_{j}}$$
233 views

### Why doesn't Mathematica provide an answer while Wolfram|Alpha does, concerning a series convergence?

Among other series I've been working on, I was asked to find whether $$\sum_n 1-\cos(\frac{\pi}{n})$$ converged, and Mathematica's output to ...
1 vote
159 views

### How can one expand an arbitrary boolean combination into the $2^n$ atoms of the associated boolean algebra of size $2^{2^n}$?

The answer of user250938 to Can one usefully apply the Boolean functions of Mathematica to measurable Boolean sets? and the second comment of Monroe Eskew to the answer to https://mathoverflow.net/...
1 vote
247 views

### The Branch Cut of the Complex Logarithm Used by Default in Wolfram Alpha

The title says it all: what branch cut (like which value of $k$ in $\ln(z)=\ln(r)+i(\theta+2\pi k))$ does Wolfram Alpha use by default in calculating the complex logarithm. I would say "principal ...
437 views

### step-by-step solution unavailable (( possible intermediate steps ))

When using the (( WolframAlpha["integrate 1/(2+Sqrt[1-x]+Sqrt[1+x])"])) function to find integration steps, this message appears to me what is the explanation and ...
54 views

### What is the current WolframAlpha server capacity?

Considering the increasing workload WolframAlpha is now receiving as it is getting more tightly integrated into the Wolfram language. With things like Entities even ...
217 views

### How to change the Wolfram Alpha query timeout for Ctrl+=?

Sometimes retrieving results from Wolfram Alpha takes time and the default query timeout is not sufficient. For engagement with Wolfram Alpha implicitly for expr ...
1 vote
45 views

### How can I price of 100 EUR in RON on 1st of every month back to 4 years

I would like to see the difference between 450 RON and 100EUR converted to RON on 1st of every month back to 4 years. possibly with a cumulated chart...
504 views

### Difference between free-form input via WolframAlpha[] and CTRL+=

WolframAlpha["query"] - https://reference.wolfram.com/language/ref/WolframAlpha.html Free-form input - https://reference.wolfram.com/language/workflow/EnterFreeFormInput.html For example: ...
875 views

### Step by step solution of a limit of a sequence - Calling Wolfram|Alpha in Mathematica

I'd like to visualiza the step-by-step solution of the following limit by calling Wolfram|Alpha in Mathematica, but I don't know how to specify that n is a positive integer variable: ...
1 vote
128 views

### WolframAlpha does not give stepwise solution for a simple twodimensional integral

Why does the behave this particular way: ...
77 views

### Quick Wolfram Question [closed]

This is my code so far: For[i=2, i<10, i++, Solve[x^i == x+1 && x >0]] I would like to sum up all the x values that it outputs. How can I do so?
1 vote
476 views

### Is there a way to copy/paste an expression from Mathematica into Wolfram Alpha?

For example, I have the expression $$\int_0^t \frac{\lambda e^{-\lambda x} (\lambda x)^{k-1}}{(k-1)!} \, dx$$ (written that way in Mathematica). Is there a simple way to copy/paste the (in this ...
166 views

### Daylight hours vs calendar date

Is there a way in Mathematica or Wolfram Alpha to get a plot of daylight hours vs calendar date and rate of change of daylight hours vs calendar date. Lets say I want the plot for latitude 45 degrees ...
512 views

### How to calculate complicated expression in WolframAlpha

I need to evaluate the limit: $$\lim_{n\to\infty}\prod_{k=1}^\infty \left(1-\frac{n}{\left(\frac{n+\sqrt{n^2+4}}{2}\right)^k+\frac{n+\sqrt{n^2+4}}{2}}\right).$$ I could not type into WolframAlpha ...
91 views

### U.S. Treasury Yield Curve via WolframAlfa

Disturbingly coincident with the U.S. Treasury Yield Curve's recent volatility and inversion, the previously highly reliable & available data from the Treasury's website at Treasury's website xml ...
123 views

### Wolfram Alpha missing solutions to a quadratic equation over the integers?

I don't have Mathematica, but Wolfram Alpha appears to miss integer solutions to bivariate quadratic equation: solve over integers X^2 + 1672739 Y^2 = 4680419795530281540 returns only two pairs of ...
36 views

I have this: ...
Is it possible to query WolframAlpha from a wolframscript query? The following yields $Failed: ... 1 vote 1 answer 152 views ### How to create a find-and-replace code in Mathematica? Let's say I have a group of X's characters that I want to cut down. I want to use a method similar to 'find-and-replace-all' tool from Word, which takes an amount of X's each time, deletes them, and ... 0 votes 1 answer 71 views ### Could not solve this equation by Solve and also get nearly correct plot by Wolfram|Alpha [closed] Input: Solve[y'[x] == -(224.8 ((y[x]^2 - y[x]/10^11 - (0.000010385 x^3)/E^(2 x))/x^2)), y[x], x] Output: ... 0 votes 0 answers 84 views ### Is it possible to get the required mathematica code from wolfram alpha input? It is very easy to get an out put in wolfram alpha if the input is very complicated and mathematica coding giving some problem. So is it possible to convert an wolfram alpha input to a standard ... 0 votes 1 answer 77 views ### How do I obtain the characteristics and properties of an alloy? [closed] I would like to obtain the characteristics and properties of the Alloy Chromel. How do I download that information from the database of Wolfram Alpha and then print it in a Mathematica Notebook? ... 2 votes 0 answers 61 views ### How to get the events and holidays occurred on a list of dates? I have a list of 100 unix timestamps and I am trying to get all the events occurred on that time. The following code get an abort signal when a has 100 timestamps. Another problem is that when I run ... 0 votes 2 answers 414 views ### Getting the full result from a Wolfram|Alpha query? I'm trying to get the list of numbers using this query: WolframAlpha[ "integers | perfect square and having 9 digits", {{"Result", 1}, "NumberData"}] By ... 4 votes 1 answer 110 views ### Discrepancy between area given by CountryData and GeoArea of FullPolygon CountryData["US", "Area"] puts the area of U.S. at$9.63\times 10^6 \textrm{ km}^2$, while ... 3 votes 1 answer 4k views ### Why can't I plot two graphs on the same plane in WolframAlpha? When I plot these graphs separately everything is OK, but when I try to plot them simultaneously I get error. Why? 0 votes 1 answer 132 views ### Unexpected omission by Wolfram Alpha [closed] When Alpha is submitted the equation$a(a^2-1)=2b^2$, it unexpectedly forgets the integer solution$a=1,b=0\$. What could explain this ? http://www.wolframalpha.com/input/?i=a(a%5E2-1)%3D2b%5E2
Take this sum for example: $$\sum_{n=2}^\infty\frac1{\log(n!)}$$ Wolfram says that this does not converge by the comparison test. However, when I use Mathematica's ...