# Factual Questions **URL:** https://boards.straightdope.com/c/factual-questions/9.md?page=276 [Latest](https://boards.straightdope.com/latest.md) · [Categories](https://boards.straightdope.com/categories.md) · [Tags](https://boards.straightdope.com/tags.md) **Page:** 277 --- ## [Earth and moon from mars](https://boards.straightdope.com/t/earth-and-moon-from-mars/943854)
**Author:** [@breakneck](https://boards.straightdope.com/u/breakneck)\ **Replies:** 26\ **Last updated:** [June 10, 2021, 12:03am UTC](https://boards.straightdope.com/t/earth-and-moon-from-mars/943854 "2021-06-10T00:03:20Z")
How come the photos from mars shows you can see the earth and the moon. Does Mars have moons? how come we cant see them ? --- ## [How much oil can a car burn in 1000 miles, a week of driving?](https://boards.straightdope.com/t/how-much-oil-can-a-car-burn-in-1000-miles-a-week-of-driving/943847)
**Author:** [@Edward\_The\_Head](https://boards.straightdope.com/u/Edward_The_Head)\ **Replies:** 18\ **Last updated:** [June 9, 2021, 8:45pm UTC](https://boards.straightdope.com/t/how-much-oil-can-a-car-burn-in-1000-miles-a-week-of-driving/943847 "2021-06-09T20:45:58Z")
I have a 2007 Ford Escape. It seems to be losing oil, but I know it’s not leaking as I see no spots in my driveway. I just got the oil changed 7-10 days ago, I went on a highway trip and have put about 1000 miles on it i… --- ## [A friend has developed a resistance to anti-biotics](https://boards.straightdope.com/t/a-friend-has-developed-a-resistance-to-anti-biotics/943820)
**Author:** [@TheGreenHornet](https://boards.straightdope.com/u/TheGreenHornet)\ **Replies:** 11\ **Last updated:** [June 9, 2021, 7:04pm UTC](https://boards.straightdope.com/t/a-friend-has-developed-a-resistance-to-anti-biotics/943820 "2021-06-09T19:04:55Z")
She developed this by using anti-biotics prescribed by a doctor for a chronic urinary tract infection which began some years ago. I tried to tell her the risks of doing that a couple of yrs. ago. Does anyone know of a … --- ## [ID sound from trees - SW Michigan](https://boards.straightdope.com/t/id-sound-from-trees-sw-michigan/943768)
**Author:** [@Dinsdale1](https://boards.straightdope.com/u/Dinsdale1)\ **Replies:** 20\ **Last updated:** [June 9, 2021, 6:12pm UTC](https://boards.straightdope.com/t/id-sound-from-trees-sw-michigan/943768 "2021-06-09T18:12:43Z")
I’d appreciate assistance identifying the source of a sound we heard from high in the trees last weekend in SW Mich - NE of Muskegon. The call was a single note, repeated maybe 10-15 times. The most significant aspect … --- ## [Why are oven doors hinged at the bottom?](https://boards.straightdope.com/t/why-are-oven-doors-hinged-at-the-bottom/943682)
**Author:** [@DCnDC](https://boards.straightdope.com/u/DCnDC)\ **Replies:** 69\ **Last updated:** [June 9, 2021, 4:37pm UTC](https://boards.straightdope.com/t/why-are-oven-doors-hinged-at-the-bottom/943682 "2021-06-09T16:37:46Z")
I assume there’s a practical reason why modern oven doors are typically hinged at the bottom. It’s standard even on most toaster ovens. Almost no other door one usually encounters works that way; they are almost always h… --- ## [What Gives Money Its Value?](https://boards.straightdope.com/t/what-gives-money-its-value/848013)
**Author:** [@Jim\_B](https://boards.straightdope.com/u/Jim_B)\ **Replies:** 110\ **Last updated:** [June 9, 2021, 4:30pm UTC](https://boards.straightdope.com/t/what-gives-money-its-value/848013 "2021-06-09T16:30:44Z")
True story. Back in HS government class, our teacher told us US money is backed with basically nothing. Then she gave us a parable. If someone gave you a thousand dollars, what would you do, burn it or spend it. Anyway … --- ## [iTunes Question (Duplication)](https://boards.straightdope.com/t/itunes-question-duplication/943886)
**Author:** [@19USMC69](https://boards.straightdope.com/u/19USMC69)\ **Replies:** 4\ **Last updated:** [June 9, 2021, 4:06pm UTC](https://boards.straightdope.com/t/itunes-question-duplication/943886 "2021-06-09T16:06:09Z")
I purchased/downloaded an album from iTunes. All the individual songs appear on my iPhone, but in duplicate. The duplicates appear with a shaded circle with an arrow pointing down. Until recently it was a “cloud” icon. A… --- ## [What's the Straight Dope on Fixed Point Wireless?](https://boards.straightdope.com/t/whats-the-straight-dope-on-fixed-point-wireless/943807)
**Author:** [@Reeses\_Monkey](https://boards.straightdope.com/u/Reeses_Monkey)\ **Replies:** 21\ **Last updated:** [June 8, 2021, 9:45pm UTC](https://boards.straightdope.com/t/whats-the-straight-dope-on-fixed-point-wireless/943807 "2021-06-08T21:45:47Z")
My husband and I are thinking of telling our cable company where they can stick their co-ax. Our current, internet-only service is running over $94 a month. If we choose to upgrade to the new version (we’re grandfathered… --- ## [How do you "seize funds" from a digital wallet?](https://boards.straightdope.com/t/how-do-you-seize-funds-from-a-digital-wallet/943795)
**Author:** [@ratatoskK](https://boards.straightdope.com/u/ratatoskK)\ **Replies:** 6\ **Last updated:** [June 8, 2021, 3:49pm UTC](https://boards.straightdope.com/t/how-do-you-seize-funds-from-a-digital-wallet/943795 "2021-06-08T15:49:35Z")
This story about the recovery of ransomware funds says: Officials said that they identified a virtual currency account, often referred to as a “wallet,” that DarkSide had use to collect payment from one of its ransomwa… --- ## [Post pandemic baby boom?](https://boards.straightdope.com/t/post-pandemic-baby-boom/943823)
**Author:** [@dtilque](https://boards.straightdope.com/u/dtilque)\ **Replies:** 5\ **Last updated:** [June 8, 2021, 3:05pm UTC](https://boards.straightdope.com/t/post-pandemic-baby-boom/943823 "2021-06-08T15:05:21Z")
I’ve been reading some places that there will be a post pandemic baby boom, starting this summer or autumn. Other articles, such as the one linked below, say it won’t happen. Does anyone have the straight dope on this? I… --- ## [Ransomware \[edited title\]](https://boards.straightdope.com/t/ransomware-edited-title/943474)
**Author:** [@carnivorousplant](https://boards.straightdope.com/u/carnivorousplant)\ **Replies:** 57\ **Last updated:** [June 8, 2021, 12:30pm UTC](https://boards.straightdope.com/t/ransomware-edited-title/943474 "2021-06-08T12:30:32Z")
Two important industries were recently hit with ransomeware. Do we know how they were infected? Were the infecting PCs running an admin account? Were backups unavailable? --- ## [Seeking advice/experience on run-flat tires](https://boards.straightdope.com/t/seeking-advice-experience-on-run-flat-tires/922712)
**Author:** [@pullin](https://boards.straightdope.com/u/pullin)\ **Replies:** 25\ **Last updated:** [October 19, 2020, 9:45pm UTC](https://boards.straightdope.com/t/seeking-advice-experience-on-run-flat-tires/922712 "2020-10-19T21:45:23Z")
I’m curious about run-flat tires for my pickup truck and trailer. Summary: After a highway blowout\* on a trailer tire, I was thanking various deities it happened near a freeway exit. Just prior, we had been in a singl… --- ## [Please educate me on the plethora of Pride flags](https://boards.straightdope.com/t/please-educate-me-on-the-plethora-of-pride-flags/943744)
**Author:** [@Northern\_Piper](https://boards.straightdope.com/u/Northern_Piper)\ **Replies:** 3\ **Last updated:** [June 8, 2021, 5:25am UTC](https://boards.straightdope.com/t/please-educate-me-on-the-plethora-of-pride-flags/943744 "2021-06-08T05:25:03Z")
Pride week, and I’ve noticed a lot more types of flags flying. There’s the standard rainbow one🏳️‍🌈, but I’ve seen variants on it, and also new (to me) flags. Any guidance would be appreciated. --- ## [Training of dogs for explosives detection](https://boards.straightdope.com/t/training-of-dogs-for-explosives-detection/928896)
**Author:** [@Turki-lurki](https://boards.straightdope.com/u/Turki-lurki)\ **Replies:** 17\ **Last updated:** [June 8, 2021, 12:45am UTC](https://boards.straightdope.com/t/training-of-dogs-for-explosives-detection/928896 "2021-06-08T00:45:02Z")
This morning I listened to an MSNBC interview with a guy named Jim Cavanaugh on the Tennessee explosion- he described a Federal training program for explosive detection dogs. I did not hear this clearly but I think he st… --- ## [How quiet can I make 800 million lbs of jet thrust? (Or; noise levels of ridiculously giant heavier-than-air ships)](https://boards.straightdope.com/t/how-quiet-can-i-make-800-million-lbs-of-jet-thrust-or-noise-levels-of-ridiculously-giant-heavier-than-air-ships/943372)
**Author:** [@Ranchoth](https://boards.straightdope.com/u/Ranchoth)\ **Replies:** 4\ **Last updated:** [June 8, 2021, 12:06am UTC](https://boards.straightdope.com/t/how-quiet-can-i-make-800-million-lbs-of-jet-thrust-or-noise-levels-of-ridiculously-giant-heavier-than-air-ships/943372 "2021-06-08T00:06:13Z")
Silly, esoteric technical question time! Some background: I’ve been playing a bit of Cyberpunk 2077. Which, befitting the aesthetic of the genre, features some giant cargo airships with video billboards mounted on the si… --- ## [What are the chances that five cards could permit a straight in Texas Hold Em?](https://boards.straightdope.com/t/what-are-the-chances-that-five-cards-could-permit-a-straight-in-texas-hold-em/943735)
**Author:** [@RickJay](https://boards.straightdope.com/u/RickJay)\ **Replies:** 5\ **Last updated:** [June 7, 2021, 8:01pm UTC](https://boards.straightdope.com/t/what-are-the-chances-that-five-cards-could-permit-a-straight-in-texas-hold-em/943735 "2021-06-07T20:01:30Z")
I like poker, something I’ve mentioned before. I have noticed that when playing Hold 'Em, once five cards are on the board, it is usually possible for one of the players in the hand to hold a straight. For instance, if… --- ## [BA Calcutta (Failed)](https://boards.straightdope.com/t/ba-calcutta-failed/380336)
**Author:** [@Chez\_Guevara](https://boards.straightdope.com/u/Chez_Guevara)\ **Replies:** 23\ **Last updated:** [June 7, 2021, 12:15pm UTC](https://boards.straightdope.com/t/ba-calcutta-failed/380336 "2021-06-07T12:15:49Z")
I’m trying to ascertain whether this particular educational qualification has its origins in fact or whether it is apocryphal. As I recall, the joke goes that if an (Indian) person wished to impress a potential employer… --- ## [A question about Charles Darwin's "The Voyage Of The Beagle"](https://boards.straightdope.com/t/a-question-about-charles-darwins-the-voyage-of-the-beagle/943725)
**Author:** [@EinsteinsHund](https://boards.straightdope.com/u/EinsteinsHund)\ **Replies:** 7\ **Last updated:** [June 7, 2021, 5:00am UTC](https://boards.straightdope.com/t/a-question-about-charles-darwins-the-voyage-of-the-beagle/943725 "2021-06-07T05:00:17Z")
I’m close to finishing this book, and at one time Darwin mentions the cultivation and consumption of sweet potatoes by the native Maori of New Zealand. Has the sweet potato been introduced by the British colonists to the… --- ## [Do real estate agents in weathy areas earn way more than in midde-class or poor areas?](https://boards.straightdope.com/t/do-real-estate-agents-in-weathy-areas-earn-way-more-than-in-midde-class-or-poor-areas/920379)
**Author:** [@Mahaloth](https://boards.straightdope.com/u/Mahaloth)\ **Replies:** 46\ **Last updated:** [June 7, 2021, 4:53am UTC](https://boards.straightdope.com/t/do-real-estate-agents-in-weathy-areas-earn-way-more-than-in-midde-class-or-poor-areas/920379 "2021-06-07T04:53:50Z")
This may be obvious, but I wonder about this sometimes. Do real estate agents in wealthy areas earn way more than in midde-class or poor areas? How is it determined who takes what area? I would think they would all… --- ## [Custom shirt - waist measurement](https://boards.straightdope.com/t/custom-shirt-waist-measurement/943565)
**Author:** [@mixdenny](https://boards.straightdope.com/u/mixdenny)\ **Replies:** 19\ **Last updated:** [June 7, 2021, 4:21am UTC](https://boards.straightdope.com/t/custom-shirt-waist-measurement/943565 "2021-06-07T04:21:08Z")
I want to wear a tie at an upcoming function. I swore them off 20 years ago. The problem is if I buy a large shirt that fits nice the neck is too tight. If I buy a shirt with a 19" neck that is comfortable buttoned I am … --- ## [iPhone remote control with Sony TV](https://boards.straightdope.com/t/iphone-remote-control-with-sony-tv/943681)
**Author:** [@Johnny\_L.A](https://boards.straightdope.com/u/Johnny_L.A)\ **Replies:** 6\ **Last updated:** [June 7, 2021, 2:08am UTC](https://boards.straightdope.com/t/iphone-remote-control-with-sony-tv/943681 "2021-06-07T02:08:39Z")
We have a Sony X800G we got in December, 2019. I see a TV remote control on my iPhone 6S. I clicked it, and it searched for a TV but didn’t find one. Is there a way to use the iPhone remote control with our TV? If so… --- ## [Who to call to work on an riser above the electric meter on my hiuse?](https://boards.straightdope.com/t/who-to-call-to-work-on-an-riser-above-the-electric-meter-on-my-hiuse/943728)
**Author:** [@Si\_Amigo](https://boards.straightdope.com/u/Si_Amigo)\ **Replies:** 2\ **Last updated:** [June 7, 2021, 12:39am UTC](https://boards.straightdope.com/t/who-to-call-to-work-on-an-riser-above-the-electric-meter-on-my-hiuse/943728 "2021-06-07T00:39:57Z")
I am having new gutters installed, they are 6" wide and replacing 5" wide ones. The electric lines going into the meter first come into a conduit that is at the top of the house. This conduit is shaped to go around my e… --- ## [What is the deal with Facebook Marketplace shipping?](https://boards.straightdope.com/t/what-is-the-deal-with-facebook-marketplace-shipping/943691)
**Author:** [@UltraVires](https://boards.straightdope.com/u/UltraVires)\ **Replies:** 2\ **Last updated:** [June 6, 2021, 7:30pm UTC](https://boards.straightdope.com/t/what-is-the-deal-with-facebook-marketplace-shipping/943691 "2021-06-06T19:30:16Z")
I’ve been looking for some used items, mainly a small lawn mower and a window a/c unit. When I go on Facebook Marketplace, I see many items, some as far away as Alaska for very modest prices (under $100 or even under $5… --- ## [How does the federal system of pay levels work?](https://boards.straightdope.com/t/how-does-the-federal-system-of-pay-levels-work/943303)
**Author:** [@Roger\_That](https://boards.straightdope.com/u/Roger_That)\ **Replies:** 8\ **Last updated:** [June 6, 2021, 6:05pm UTC](https://boards.straightdope.com/t/how-does-the-federal-system-of-pay-levels-work/943303 "2021-06-06T18:05:30Z")
Very specifically, I’m trying to write about which level (GS-xx) a speechwriter (officially a “Special Assistant”) for a Cabinet official in the early 1960s would be at, approximately. I don’t need precision, but if you … --- ## [Why is she popularly known as Eva Braun and not Eva Hitler](https://boards.straightdope.com/t/why-is-she-popularly-known-as-eva-braun-and-not-eva-hitler/943394)
**Author:** [@Asuka](https://boards.straightdope.com/u/Asuka)\ **Replies:** 30\ **Last updated:** [June 6, 2021, 8:57am UTC](https://boards.straightdope.com/t/why-is-she-popularly-known-as-eva-braun-and-not-eva-hitler/943394 "2021-06-06T08:57:09Z")
I see there’s a previous topic about this but it’s 16 years old and only got 10 replies which don’t seem to answer anything and the mods tend to kill zombie threads so I felt this is safer. Basically why is it in popula… --- ## [How common is two perpetrators in this sort of crime?](https://boards.straightdope.com/t/how-common-is-two-perpetrators-in-this-sort-of-crime/943664)
**Author:** [@Danger\_Man](https://boards.straightdope.com/u/Danger_Man)\ **Replies:** 5\ **Last updated:** [June 6, 2021, 8:41am UTC](https://boards.straightdope.com/t/how-common-is-two-perpetrators-in-this-sort-of-crime/943664 "2021-06-06T08:41:08Z")
In 2000 two girls ages 8 and 10 were raped and murdered in Norway and two people were convicted. One of them is now released because he might be innocent. One of the aspects discussed is that this sort of crime is alm… --- ## [How much salt does it take to corrode electronics?](https://boards.straightdope.com/t/how-much-salt-does-it-take-to-corrode-electronics/943512)
**Author:** [@Velocity](https://boards.straightdope.com/u/Velocity)\ **Replies:** 15\ **Last updated:** [June 6, 2021, 1:14am UTC](https://boards.straightdope.com/t/how-much-salt-does-it-take-to-corrode-electronics/943512 "2021-06-06T01:14:06Z")
I was installing new speakers and headphones today with very sweaty hands and it got me to thinking about how much salt from the sweat it would take to start corroding the USB ports in my laptop (which I was inserting th… --- ## [What's the difference? cable, flex, lead](https://boards.straightdope.com/t/whats-the-difference-cable-flex-lead/943655)
**Author:** [@Muddibog](https://boards.straightdope.com/u/Muddibog)\ **Replies:** 11\ **Last updated:** [June 5, 2021, 10:41pm UTC](https://boards.straightdope.com/t/whats-the-difference-cable-flex-lead/943655 "2021-06-05T22:41:24Z")
I hear these words used interchangeably. I just want to make sure that I’m using them correctly. From my understanding: • When I think of cable, I think of a coaxial cable, although it can refer to any wire or wires en… --- ## [What's the general name for a positive third derivative f'''(.) \> 0](https://boards.straightdope.com/t/whats-the-general-name-for-a-positive-third-derivative-f-0/943645)
**Author:** [@OldGuy](https://boards.straightdope.com/u/OldGuy)\ **Replies:** 7\ **Last updated:** [June 5, 2021, 4:07pm UTC](https://boards.straightdope.com/t/whats-the-general-name-for-a-positive-third-derivative-f-0/943645 "2021-06-05T16:07:07Z")
A question for all you math scholars. If the first derivative of a function is positive the the function is increasing. But increasing is a more general description as the function need not be differentiable. If the se… --- ## [Physics Question: energy used to hold a pendulum on course?](https://boards.straightdope.com/t/physics-question-energy-used-to-hold-a-pendulum-on-course/943639)
**Author:** [@HoneyBadgerDC](https://boards.straightdope.com/u/HoneyBadgerDC)\ **Replies:** 8\ **Last updated:** [June 5, 2021, 3:08pm UTC](https://boards.straightdope.com/t/physics-question-energy-used-to-hold-a-pendulum-on-course/943639 "2021-06-05T15:08:43Z")
I will phrase this question as best I can. If you need clarification I will do my best. The question relates to a pendulum. For example I have a 12" string with a 2 oz metal ball on the end. I assume it has a certain deg… [Previous page](https://boards.straightdope.com/c/factual-questions/9.md?page=275) [Next page](https://boards.straightdope.com/c/factual-questions/9.md?page=277)