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## How to calculate average speed

I recently encountered a puzzle where a person drove 120 miles at 40mph, then drove back the same 120 miles at 60mph. The average of the speeds is (40mph+60mph)/2 = 50mph, so the total trip time s...

physics

## The equivalent to pluralising a word?

To turn "pencil" to "pencils" is to pluralise. To turn a verb into it's 'associated' (?) verb is what? Example: "Lease" to "leasing", "look&q

english-language

Can anyone help us compute the following integral: For any $h,k \in \mathbb{R}$,and $\gamma, \theta, \alpha, r$ and $x$ are all positive. I(h,k)=\int_{0}^{\infty}

mathematics

## What is the difference between a measurement and any other interaction in quantum mechanics?

We've learned that the wave function of a particle collapses when we measure a particle's location. If it is found, it becomes more probable to find it a again in the same area, and if not the

physics

## Food Prepared by Following a Recipe

What do we call the food that we made/prepared by following a recipe? It doesn't have to be a single word actually. I just want a shorter term for that.

english-language

## What is your simplest explanation of the string theory?

How would you explain string theory to non physicists such as myself? I'm specially interested on how plausible is it and what is needed to successfully prove it?

physics

## Was the “Ye Olde Shoppe” ever used or is it just an ancient-looking construct of modern times?

Surely, if I were the owner of a shop selling archery goods and wanted to portray my shop as some kind of old-fashioned, high-quality traditional outlet, I might be tempted to call it “Ye Olde Arch.

english-language

## Single word, or good words/phrase for "confusingly asked question where meaning changes."

I'm gonna simplify and clarify this question, since it has proved popular: Look at this SO QA .. Where an ellipsis exists, is there a term for the missing text? Observe that at first it appears

english-language

## Prove by introduction rules (P ⇒ Q) || (Q ⇒ R)⇒ (P NOT Q ⇒ R), (P ⇒ Q)⇒ !Q⇒ !P + more.

I've been given the following introduction proofs and I need to solve the following questions. There aren't yet any answers to the solutions so I was hoping for some help, to compliment the pr

mathematics

## Prime with digits reversed is prime?

Well, just another idea came up into my mind and i have no idea how to solve it :D Is there infinitely many prime numbers, which are not repunits and their inverse is also prime? (For example, inve...

mathematics

## Word for young mustache?

How in one word do you describe the soft, thin, first-time mustache that grows when a boy goes through puberty? Tender? Immature?

english-language

## What was the political process by which individual settlements became the 13 colonies? [on hold]

The first settlers in what would become the U.S. founded small settlements like Jamestown. Eventually these grew to multi-city almost-states. Did the separate settlements voluntarily merge, or was ..

history

## When did prostitution become illegal in the United States and why?

In the old west, it appears that prostitution was a viable means of making a living, Perfectly legal, or at least not prosecuted. What was the status of prostitution in more established states in the

history

## Is there any historical basis for the red/white color scheme of the Assassins?

I recently saw a documentary about the Crusades, and during the scene in which Saladin is almost assassinated by the historical order of Assassins, they are portrayed as wearing plain white clothes ..

history

## Why was the World Trade Center selected as a target by Al Qaeda?

In 2001, the terrorist organization al-Qaeda attacked a series of targets inside the United States. The Pentagon was the symbol of America's military strength, and the second planned DC target ...

history

## Did the USSR invite other astronauts of Apollo 11 besides Armstrong?

Sometime after the return of Apollo 11, Neil Armstrong visited the USSR. I wonder why he was alone? Weren't the other astronauts invited or they refused to visit? Was it because Armstrong was an ...

history

## Was it possible to travel between Riverdale and Midtown Manhattan via taxi during the 1940s?

I'm writing a book that takes place in New York City in 1943. I have a character that lives in Riverdale, but works in midtown Manhattan. If one needed to travel quickly, could you take a taxi from .

history

## What kind of device is pictured on this Roman mosaic from Villa Tellaro, Sicily?

Based on numismatic evidence, this is dated in the second half of the fourth century CE

history

## How important were “columnar” strategies in Japan's invasion of China?

In trying to invade a large country like China, there are at least two main strategies 1) a narrow "columnar" strategy, usually based along an artery such as the Yangtze River that provides a natural

history

## Did the date of 9/11 have significance, or was it chosen randomly?

One thing I've been wondering ever since 9/11 is whether the date was randomly chosen, or if it was chosen specifically for its resemblance to the American emergency hotline 9-1-1 (or something else)?

history

## Using “resolve” to mean “turn (into)”

Liquidation is the process of resolving a company's assets into cash. Is the word resolve used correctly here?

english-language

## Can “a-mingle” be a verb in imperative mood?

In the last lines of "Jingle Bells Rock": Jingle bell time is a swell time To go gliding in a one-horse sleigh Giddy-up jingle horse, pick up your feet Jingle around the clock

english-language

## Word/phrase for “the one that brings bad luck” (e.g. to a group)

Example: I've always considered myself a/as [...]. I thought of black cat. But I think it's a little ambiguous and weird to use it in this situation.

english-language

## What's the difference in meaning between “evidence” and “proof”?

What's the difference between "evidence" and "proof"? I've noticed that the word "evidence" is often used in English as if it meant proof. For example, ...there is evidence of human existence in

english-language

## Condescension or condescenscion? [on hold]

Merriam-Webster dictionary (official android app) only recognizes condescension, however, in page 341 of Verbal Advantage, it reads condescenscion. Which spelling is correct?

english-language