# Factual Questions **URL:** https://boards.straightdope.com/c/factual-questions/9.md?page=287 [Latest](https://boards.straightdope.com/latest.md) · [Categories](https://boards.straightdope.com/categories.md) · [Tags](https://boards.straightdope.com/tags.md) **Page:** 288 --- ## [What self-interested incentives did white Northerners have to oppose slavery?](https://boards.straightdope.com/t/what-self-interested-incentives-did-white-northerners-have-to-oppose-slavery/938714)
**Author:** [@MichaelEmouse](https://boards.straightdope.com/u/MichaelEmouse)\ **Replies:** 82\ **Last updated:** [April 21, 2021, 4:39pm UTC](https://boards.straightdope.com/t/what-self-interested-incentives-did-white-northerners-have-to-oppose-slavery/938714 "2021-04-21T16:39:39Z")
While the humanitarian reasons for abolition were morally sufficient, what were the self-interested, perhaps mainly financial, reasons why white Northerners or subsets of them would have opposed slavery or the extension … --- ## [What wireless headphones compatible with iPod touch 3rd gen?](https://boards.straightdope.com/t/what-wireless-headphones-compatible-with-ipod-touch-3rd-gen/940424)
**Author:** [@suranyi](https://boards.straightdope.com/u/suranyi)\ **Replies:** 4\ **Last updated:** [April 21, 2021, 2:43pm UTC](https://boards.straightdope.com/t/what-wireless-headphones-compatible-with-ipod-touch-3rd-gen/940424 "2021-04-21T14:43:41Z")
I have an old iPod touch. 3rd generation, runs iOS 5.1.1. The operating system cannot be updated — I’ve tried. I would really like wireless headphones for this device, but I’m stumped. Every one I’ve seen requires iOS … --- ## [Why do people rub their forehead when they are tired?](https://boards.straightdope.com/t/why-do-people-rub-their-forehead-when-they-are-tired/940155)
**Author:** [@Fiendish\_Astronaut](https://boards.straightdope.com/u/Fiendish_Astronaut)\ **Replies:** 6\ **Last updated:** [April 21, 2021, 6:11am UTC](https://boards.straightdope.com/t/why-do-people-rub-their-forehead-when-they-are-tired/940155 "2021-04-21T06:11:43Z")
I was babysitting my little niece recently and she woke up a couple of hours after going to bed and called for me. So I went up to check on her and she was sitting up half asleep and rubbing her forehead with the palms o… --- ## [Etiquette for leaving the King of England--walking backwards?](https://boards.straightdope.com/t/etiquette-for-leaving-the-king-of-england-walking-backwards/939894)
**Author:** [@chappachula](https://boards.straightdope.com/u/chappachula)\ **Replies:** 96\ **Last updated:** [April 21, 2021, 5:05am UTC](https://boards.straightdope.com/t/etiquette-for-leaving-the-king-of-england-walking-backwards/939894 "2021-04-21T05:05:08Z")
In the movie from 2017 called “Churchill”, there is a scene where Winston Churchill is invited to Buckingham Palace for a private meeting with King George. When the politician leaves, the two men walk towards the door … --- ## ["Most Prison Rape is Actually Prison Guard on Male Prisoner"](https://boards.straightdope.com/t/most-prison-rape-is-actually-prison-guard-on-male-prisoner/940419)
**Author:** [@Asuka](https://boards.straightdope.com/u/Asuka)\ **Replies:** 1\ **Last updated:** [April 21, 2021, 1:42am UTC](https://boards.straightdope.com/t/most-prison-rape-is-actually-prison-guard-on-male-prisoner/940419 "2021-04-21T01:42:04Z")
I’ve heard this a few times, including from former prisoners but google just gives me individual examples. But the idea being that despite the popular perception of how prison Rape is entirely prisoner on prisoner, the … --- ## [Keeping a Japanese red maple tree indoors](https://boards.straightdope.com/t/keeping-a-japanese-red-maple-tree-indoors/940353)
**Author:** [@Mike\_Mabes](https://boards.straightdope.com/u/Mike_Mabes)\ **Replies:** 9\ **Last updated:** [April 21, 2021, 1:21am UTC](https://boards.straightdope.com/t/keeping-a-japanese-red-maple-tree-indoors/940353 "2021-04-21T01:21:13Z")
For sentimental reasons I will not go into, would like to have one about 5 ft tall in my apt. Now I know from reading on several websites that it would not last forever (at least not without a whole lot of care and even … --- ## [External drive](https://boards.straightdope.com/t/external-drive/940212)
**Author:** [@bob\_2](https://boards.straightdope.com/u/bob_2)\ **Replies:** 9\ **Last updated:** [April 20, 2021, 5:35pm UTC](https://boards.straightdope.com/t/external-drive/940212 "2021-04-20T17:35:12Z")
How can you tell if someone plugged an external drive to a PC on W10? --- ## [How many users per media server?](https://boards.straightdope.com/t/how-many-users-per-media-server/940326)
**Author:** [@Darren\_Garrison](https://boards.straightdope.com/u/Darren_Garrison)\ **Replies:** 5\ **Last updated:** [April 20, 2021, 3:12pm UTC](https://boards.straightdope.com/t/how-many-users-per-media-server/940326 "2021-04-20T15:12:08Z")
Mike Lindell claims that his new social media platform–which he describes as sort of like a combination of Youtube and Twitter–can handle a billion members. I’m wondering how many people can be handled by a streaming med… --- ## [Why so little melanin on palms and soles?](https://boards.straightdope.com/t/why-so-little-melanin-on-palms-and-soles/939622)
**Author:** [@Fotheringay-Phipps](https://boards.straightdope.com/u/Fotheringay-Phipps)\ **Replies:** 35\ **Last updated:** [April 20, 2021, 12:48pm UTC](https://boards.straightdope.com/t/why-so-little-melanin-on-palms-and-soles/939622 "2021-04-20T12:48:18Z")
Question in the title, but to be clear, the question is not about the physiology which produces little melanin in those areas. Rather it’s about why people would have evolved in such a manner. --- ## [Helicopters bringing hot water for hot showers for U.S. troops, a real thing?](https://boards.straightdope.com/t/helicopters-bringing-hot-water-for-hot-showers-for-u-s-troops-a-real-thing/939775)
**Author:** [@Velocity](https://boards.straightdope.com/u/Velocity)\ **Replies:** 41\ **Last updated:** [April 20, 2021, 11:52am UTC](https://boards.straightdope.com/t/helicopters-bringing-hot-water-for-hot-showers-for-u-s-troops-a-real-thing/939775 "2021-04-20T11:52:40Z")
I recently read on Reddit (take it with a huge grain of salt; we all know how reliable that site is) that a North Vietnamese soldier was interviewed after the end of the Vietnam War and he said that he had once observed … --- ## [Why does Ingenuity have a black-and-white camera?](https://boards.straightdope.com/t/why-does-ingenuity-have-a-black-and-white-camera/940250)
**Author:** [@Dahu](https://boards.straightdope.com/u/Dahu)\ **Replies:** 8\ **Last updated:** [April 20, 2021, 5:27am UTC](https://boards.straightdope.com/t/why-does-ingenuity-have-a-black-and-white-camera/940250 "2021-04-20T05:27:16Z")
I saw an article on its first attempted flight tomorrow what says it has two cameras, one colour and one black-and-white downward facing navigation camera. What advantage is there with back and white that makes it more … --- ## [What Government/Military Agency Would Lead a Response to a Presumed Alien Landing?](https://boards.straightdope.com/t/what-government-military-agency-would-lead-a-response-to-a-presumed-alien-landing/940267)
**Author:** [@Malice](https://boards.straightdope.com/u/Malice)\ **Replies:** 21\ **Last updated:** [April 20, 2021, 3:43am UTC](https://boards.straightdope.com/t/what-government-military-agency-would-lead-a-response-to-a-presumed-alien-landing/940267 "2021-04-20T03:43:17Z")
Scenario: An object originating form outside the solar system is tracked as it makes several course corrections, strongly suggesting an intelligent operator, before landing somewhere in the continental U.S… Is there a g… --- ## [WWII destroyer question](https://boards.straightdope.com/t/wwii-destroyer-question/940341)
**Author:** [@carnivorousplant](https://boards.straightdope.com/u/carnivorousplant)\ **Replies:** 2\ **Last updated:** [April 20, 2021, 1:18am UTC](https://boards.straightdope.com/t/wwii-destroyer-question/940341 "2021-04-20T01:18:21Z")
I am reading “Tin Can Titans”. USS Radford, coming to the aid of another destroyer damaged by a mine, hit another mine. To lighten ship, anchors and “spare gun barrels” were thrown overboard. Were these BAR barrels, or… --- ## [Maximum number of mathematicians in this joke](https://boards.straightdope.com/t/maximum-number-of-mathematicians-in-this-joke/939113)
**Author:** [@Johnny\_L.A](https://boards.straightdope.com/u/Johnny_L.A)\ **Replies:** 69\ **Last updated:** [April 19, 2021, 9:56pm UTC](https://boards.straightdope.com/t/maximum-number-of-mathematicians-in-this-joke/939113 "2021-04-19T21:56:36Z")
Funny joke, but an infinite number of mathematicians is too many. There are only so many molecules in a pint of beer. To make it even more complex, there aren’t ‘beer molecules’, but a number of molecules that, in com… --- ## [What is a jsp extension?](https://boards.straightdope.com/t/what-is-a-jsp-extension/940180)
**Author:** [@Northern\_Piper](https://boards.straightdope.com/u/Northern_Piper)\ **Replies:** 4\ **Last updated:** [April 19, 2021, 9:18pm UTC](https://boards.straightdope.com/t/what-is-a-jsp-extension/940180 "2021-04-19T21:18:32Z")
There’s an online encyclopedia that I used to cite, but all of the pages were coming up as dead links. HOwever, I recently found one of the articles online. The difference is that instead of .html it has .jsp at the en… --- ## [If The British Monarch Is Crowned Before His Age Of Majority, Does His Regent Give His Coronation Speech?](https://boards.straightdope.com/t/if-the-british-monarch-is-crowned-before-his-age-of-majority-does-his-regent-give-his-coronation-speech/940211)
**Author:** [@HeyHomie](https://boards.straightdope.com/u/HeyHomie)\ **Replies:** 7\ **Last updated:** [April 19, 2021, 10:01am UTC](https://boards.straightdope.com/t/if-the-british-monarch-is-crowned-before-his-age-of-majority-does-his-regent-give-his-coronation-speech/940211 "2021-04-19T10:01:26Z")
… or do they just dispense with it? How old would King George Nth\* have to be before he’d be allowed to speak at his own coronation? 13? 18? \*Yes, I know that Prince George may very well not take George as his Regnal N… --- ## [George Floyd and Gases in Solution](https://boards.straightdope.com/t/george-floyd-and-gases-in-solution/940117)
**Author:** [@DtypeJag](https://boards.straightdope.com/u/DtypeJag)\ **Replies:** 34\ **Last updated:** [April 19, 2021, 9:59am UTC](https://boards.straightdope.com/t/george-floyd-and-gases-in-solution/940117 "2021-04-19T09:59:20Z")
At the trial today a statement was made that if a liquid (blood) was 98% saturated with oxygen there could be no more than 2% of another gas (CO) in that liquid. Am I right or wrong in remembering from chemistry class t… --- ## [Buying a phone in Germany/Europe & bringing back to the US - what to look out for?](https://boards.straightdope.com/t/buying-a-phone-in-germany-europe-bringing-back-to-the-us-what-to-look-out-for/940220)
**Author:** [@Maserschmidt](https://boards.straightdope.com/u/Maserschmidt)\ **Replies:** 9\ **Last updated:** [April 18, 2021, 2:55pm UTC](https://boards.straightdope.com/t/buying-a-phone-in-germany-europe-bringing-back-to-the-us-what-to-look-out-for/940220 "2021-04-18T14:55:51Z")
My son is studying abroad in Germany, and his phone just crapped out. He’s got a German SIM card, and what we’d like to do is buy a new(ish) phone there, and then when he returns to the US he can just put his US SIM card… --- ## [IcyHot Smart Relief: Has anyone here used it?](https://boards.straightdope.com/t/icyhot-smart-relief-has-anyone-here-used-it/792974)
**Author:** [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Replies:** 3\ **Last updated:** [April 18, 2021, 4:28am UTC](https://boards.straightdope.com/t/icyhot-smart-relief-has-anyone-here-used-it/792974 "2021-04-18T04:28:08Z")
I bought one this evening and used it earlier on a muscle that’s been cramping at night in my lower back. I can’t really feel any difference right now, but if I’m not awakened with a knot in my lower back, I should assu… --- ## [Where does the school prom come from?](https://boards.straightdope.com/t/where-does-the-school-prom-come-from/326857)
**Author:** [@copperwindow](https://boards.straightdope.com/u/copperwindow)\ **Replies:** 10\ **Last updated:** [April 17, 2021, 10:57pm UTC](https://boards.straightdope.com/t/where-does-the-school-prom-come-from/326857 "2021-04-17T22:57:49Z")
When did it first start? What is the point of it, etc? --- ## [What is limiting the production of vaccines](https://boards.straightdope.com/t/what-is-limiting-the-production-of-vaccines/940164)
**Author:** [@Danger\_Man](https://boards.straightdope.com/u/Danger_Man)\ **Replies:** 6\ **Last updated:** [April 17, 2021, 12:49pm UTC](https://boards.straightdope.com/t/what-is-limiting-the-production-of-vaccines/940164 "2021-04-17T12:49:32Z")
Clearly it is not money, as there cannot be much limit on how much states are willing to pay. --- ## [Can color be determined from black and white negatives?](https://boards.straightdope.com/t/can-color-be-determined-from-black-and-white-negatives/848766)
**Author:** [@KellyCriterion](https://boards.straightdope.com/u/KellyCriterion)\ **Replies:** 44\ **Last updated:** [April 17, 2021, 11:14am UTC](https://boards.straightdope.com/t/can-color-be-determined-from-black-and-white-negatives/848766 "2021-04-17T11:14:16Z")
I know that color can’t be conclusively determined from a printed/developed black and white photograph. What I’m wondering is, is the same true for black and white negatives? --- ## [How do I type a decimal point on my PC keyboard?](https://boards.straightdope.com/t/how-do-i-type-a-decimal-point-on-my-pc-keyboard/575032)
**Author:** [@Rrose\_Selavy](https://boards.straightdope.com/u/Rrose_Selavy)\ **Replies:** 53\ **Last updated:** [April 17, 2021, 5:51am UTC](https://boards.straightdope.com/t/how-do-i-type-a-decimal-point-on-my-pc-keyboard/575032 "2021-04-17T05:51:36Z")
This is weird after all these years of using PCs I can’t find it anywhere using shift, entrol , num pad etc Google isn’t helping either I’ve got a standard full sized PC keyboard How do i type a floating decimal poin… --- ## [Is there any data on how fast addiction can occur with something like Oxycodone?](https://boards.straightdope.com/t/is-there-any-data-on-how-fast-addiction-can-occur-with-something-like-oxycodone/938574)
**Author:** [@Whack-a-Mole](https://boards.straightdope.com/u/Whack-a-Mole)\ **Replies:** 52\ **Last updated:** [April 17, 2021, 3:18am UTC](https://boards.straightdope.com/t/is-there-any-data-on-how-fast-addiction-can-occur-with-something-like-oxycodone/938574 "2021-04-17T03:18:53Z")
My GF just finished major surgery. As is to be expected she is in pain as she recovers. She has always hated narcotics (for medical issues over the years…never recreational). They make her nauseous and dizzy and she f… --- ## [Marijuana: a cellular biology question](https://boards.straightdope.com/t/marijuana-a-cellular-biology-question/304359)
**Author:** [@Honesty](https://boards.straightdope.com/u/Honesty)\ **Replies:** 4\ **Last updated:** [April 17, 2021, 2:06am UTC](https://boards.straightdope.com/t/marijuana-a-cellular-biology-question/304359 "2021-04-17T02:06:18Z")
I’ve only tried marijuana three times in my life and each time the “high” has been significantly less intense than the last. I am not a druggie and only did in roughly eight month intervals. Why does that happen? If … --- ## [Car won't pair with iPhone](https://boards.straightdope.com/t/car-wont-pair-with-iphone/940161)
**Author:** [@Son\_of\_a\_Rich](https://boards.straightdope.com/u/Son_of_a_Rich)\ **Replies:** 2\ **Last updated:** [April 16, 2021, 7:39pm UTC](https://boards.straightdope.com/t/car-wont-pair-with-iphone/940161 "2021-04-16T19:39:55Z")
It’s been working perfectly until a couple of weeks ago: I start the car, and whatever was playing on the phone resumed in the car, like it’s supposed to. Now no joy. When I go to the car menu and hit “pair”, the car say… --- ## [IPO shares?](https://boards.straightdope.com/t/ipo-shares/940005)
**Author:** [@Bijou\_Drains](https://boards.straightdope.com/u/Bijou_Drains)\ **Replies:** 12\ **Last updated:** [April 16, 2021, 11:48am UTC](https://boards.straightdope.com/t/ipo-shares/940005 "2021-04-16T11:48:02Z")
When a company goes public the founder or founders get a lot of shares. Sometimes millions of shares. How do they determine how many shares the founders get? Do they pick a number or is that number of shares sugge… --- ## [Eligibility of stimulus checks](https://boards.straightdope.com/t/eligibility-of-stimulus-checks/939911)
**Author:** [@Hari\_Seldon](https://boards.straightdope.com/u/Hari_Seldon)\ **Replies:** 10\ **Last updated:** [April 15, 2021, 4:50pm UTC](https://boards.straightdope.com/t/eligibility-of-stimulus-checks/939911 "2021-04-15T16:50:27Z")
Rather than hijack the other thread on the subject, I start this one. Although my wife and I have been US ex-pats for over 50 years, we have religiously filed US tax returns. We never owe anything, first on account of … --- ## [Yikes! Last minute road trip to the windy city!!!](https://boards.straightdope.com/t/yikes-last-minute-road-trip-to-the-windy-city/674797)
**Author:** [@Ruby](https://boards.straightdope.com/u/Ruby)\ **Replies:** 14\ **Last updated:** [December 17, 2013, 4:23pm UTC](https://boards.straightdope.com/t/yikes-last-minute-road-trip-to-the-windy-city/674797 "2013-12-17T16:23:46Z")
Friends visiting from Tulsa want to see Chicago. I live in Fort Wayne and will be driving up in the morning. I’m finding groupons for hotels downtown for less than $100…can that be right? I know Chicago isn’t a car-fr… --- ## [The Spin of the Sun](https://boards.straightdope.com/t/the-spin-of-the-sun/939887)
**Author:** [@Jackknifed\_Juggernaut](https://boards.straightdope.com/u/Jackknifed_Juggernaut)\ **Replies:** 34\ **Last updated:** [April 15, 2021, 1:53am UTC](https://boards.straightdope.com/t/the-spin-of-the-sun/939887 "2021-04-15T01:53:57Z")
I just learned that the sun spins. And since it’s all plasma, the parts of the sun near its equator spin 3 times as fast as the parts near its poles. Question: does the sun spin on a similar plane as the plane of the p… [Previous page](https://boards.straightdope.com/c/factual-questions/9.md?page=286) [Next page](https://boards.straightdope.com/c/factual-questions/9.md?page=288)