201

From a NASA blog post made the day after contact was lost: The dust storm that is affecting Opportunity has greatly intensified. The atmospheric opacity (tau) over the rover has increased to a record 10.8 on Sol 5111 (June 10, 2018). Power levels on the rover have dropped to a record low of ~22 watt hours. As expected, Opportunity has tripped a low-power ...


94

Opportunity does not literally speak English, so no such message was expressed in those terms. However, Opportunity did communicate the information that it had a low battery and it was dark outside. The rover's flight software outputs a variety of data formats (summarized in this paper) ranging from "event reports" to telemetry to binary data produced by ...


47

Other answers give good technical answers to what the last message would actually have looked like, but I thought it worth tackling the angle of where the quote came from. Wikipedia cites an article on LAist a Los Angeles local news / blogging site, written by Jacob Margolis. In it he describes how he coined the phrase: "My battery is low and it's ...


24

I do not know if this video depicts a real incident, but it does show one type of disaster that can happen in a warehouse with overloaded shelves. I don't see any reason to believe it was faked. The Daily Mail says that the video was uploaded to youtube without any description of where it happened. They are asking the public if they know where the footage ...


20

You're not going to find studies that do something like compare the effectiveness of a rubber duck vs a stuffed parrot specifically for programmers working on debugging tasks, nor can we really measure the size of the effect, but your main question can be answered if we approach it at a slightly higher level: does talking through a problem aloud aid in ...


19

"Space" and "visible" are poorly defined, but the broad question has been widely addressed already. Can you see it from the Moon, with a naked eye? No: NASA "The only thing you can see from the Moon is a beautiful sphere, mostly white, some blue and patches of yellow, and every once in a while some green vegetation," said Alan Bean, Apollo 12 astronaut....


16

This Metro article cites a tweet by Keri Bean, an engineer who worked on the opportunity mission who had Oppy’s final measurement tattooed on her arm. This tattoo means more to me than just Oppy. Of course, the biggest significance is this is Oppy’s final measurement. I studied tau (atmospheric optical depth) as a student researcher. Don’t worry, I ...


14

I'll try my shot at giving a good referenced answer. The claim As evidenced in this clearer explanation of the claim, by efficiency it is meant that the heat of the candles is retained by the pots and released slowly. There is also a secondary claim that this makes the system efficient enough to heat an open space. There is no claim that the total energy ...


10

I can not find a positive reference for this claim. But what I've found is the text of the famous roman architect Vitruvius who pities [1] that a certain law in Ephesus, holding architects responsible for their works, does not exist in roman law: [...] When an architect [in Ephesus] was entrusted with the execution of a public work, an estimate thereof ...


8

This survey by Simmons et al. of ~1500 university professors in America shows that religious belief is negatively correlated with the academic standing of the university, and that engineering professors have some of the lowest percentages of religious belief. The authors then give some numbers regarding their data: Psychology and biology have the ...


7

The original video and forum post does a much better job explaining what is going on and states that the four (4) tea light candles are being used to warm the smaller inner flower pot which has the top drain hole blocked off while the large outer flower pot is used to create a convection effect that draws air past the warm inner pot and out the top. The ...


7

Given that it is possible that some building techniques were lost to history, we'll never been able to definitively answer this question, but we can take a look at what we are capable of building now to see how it stacks up. Taking a look at the wikipedia entry for tallest man made structures we can see that the tallest structure ever documented is the ...


6

"Next to impossible with the naked eye" Source:Space in Images DETAILS Title Great Wall of China Released 22/06/2018 11:00 am Copyright ESA Description ESA astronaut Alexander Gerst took this photo from the Cupola on the International Space Station on 19 June 2018. Gerst posted the image on social media with the comment: "I think I finally ...


6

It depends on exactly what the claim is, but it's certainly not the "longest bridge in the world". Wikipedia's list of longest bridges, lists Danyang–Kunshan Grand Bridge as the Guinness Records holder with total length of 164km. Guinness' Longest Road Bridge is Bang Na Expressway with length of 54km. The Sheikh Jaber Al-Ahmad Al-Sabah Causeway is "only" ...


5

National monument of Scotland This is not a new phenomenon and there is standing to this day a quarter built monument on Calton hill in Edinburgh that is testament to this fact. It is the National monument of Scotland and the project began in 1826 but by 1830 it had ran out of funds, and so the National monument of Scotland became better known as Edinburgh's ...


5

Foka answer is spot-on for diesel engines with DPF. The same reasoning, to a lesser degree, apply to gasoline engines too. You won't gain power or torque, not in a perceptible way. But driving a car in a "spirited" way make it run smoother. How, and how much this is relevant, depends on the age of the car. Of course, as Glen Jaron pointed out, the car ...


5

Yes, it is more efficient than just tealights, though still a very small source of heat. You note that "all heaters are 100% efficient." This is partially true - all heaters convert virtually all input energy into heat, thus achieving near 100% efficiency. However, if that heat simply rises to the ceiling by convection it doesn't do much to warm the room ...


4

The 52.5 km tower is definitely impossible no matter what technology you have. The reasons are the same as discussed for the height of a mountain in this skeptics.se answer. Above a certain height, the stone under the crust under the tower just isn't strong enough to support it. The actual details vary, but according to that accepted answer it should be ...


3

Not currently Its domain (www.diebergkomter.nl) is currently for sale, a strong indication the initiative has run out of steam. But that doesn't mean it was never considered. Not officially It has never been an official proposal or even idea by the Dutch government. Creating a new province, Flevoland, out of an inland sea, was. Building the Delta works to ...


2

Summary: I found numbers from University of Cologne (2010) which together with production-related emission numbers spread out over a number of German newspaper articles are in agreement with the claim. There is large uncertainty caused by uncertainty about the development of renewable energies in relation to increasing e-mobility and also somewhat on ...


2

Well it all depends on the initial stages of the car. An engine that is well run in will be more efficient comparably to the one which is driven slow all the time. Even rash and high RPMs are not advised on a new engine. Careful running in procedures ensure better performance as well as longevity of an engine. My Source - http://www.automotix.net/autorepair/...


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