Good at math or not?
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Re: Good at math or not?
And are you asking for a horizontal view or by "south" do you mean towards the South Pole. If that is the case, then about 70 inches.i will leave the trivial conversion to km to you.
Last edited by LANDM on Jan 28th, 2018, 9:05 am, edited 1 time in total.
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- TreeGuy
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Re: Good at math or not?
Is it snowing hard like it is right now?
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Re: Good at math or not?
I’ve instructed Fraü Farbissina to release a highly trained swallow, laden only with a gps tracker, so I can do the calculations on the second scenario from here and I will back up with figures from the appropriate mapping software. I usually use unladen swallows but they are only good for airspeed calculations.
The first scenario is simply a bit of trivial math.
I have given the answer for the third scenario.
The first scenario is simply a bit of trivial math.
I have given the answer for the third scenario.
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- alanjh595
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Re: Good at math or not?
oldtrucker wrote:Good at math? Lets see if someone comes up with the answer for this super important, real world practical math question.---
---At the first lookout area up Knox Mountain...how far can you see line of sight in kilometers looking south assuming no surface obstacles ?
Show your work. Marks will be taken off if you don't.
I would have to know the elevation of the lookout point. I think I have the equation using the 3 4 5 rule and taking in the account of the curvature of the Earth. I could come up with the answer in miles and would just have to convert it to kms.
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- Catsumi
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Re: Good at math or not?
Gazing in a southerly direction, the sky is within my field of vision. I would be gazing into a boundless universe.
My answer: infinity
My answer: infinity
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- Bsuds
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Re: Good at math or not?
"The Earth's surface curves out of sight at a distance of 3.1 miles, or 5 kilometers. But our visual acuity extends far beyond the horizon. If Earth were flat, or if you were standing atop a mountain surveying a larger-than-usual patch of the planet, you could perceive bright lights hundreds of miles distant. On a dark night, you could even see a candle flame flickering up to 30 mi. (48 km) away."
https://www.livescience.com/33895-human-eye.html
https://www.livescience.com/33895-human-eye.html
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- TreeGuy
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Re: Good at math or not?
My answer: potato salad.
- GenesisGT
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Re: Good at math or not?
Catsumi wrote:Gazing in a southerly direction, the sky is within my field of vision. I would be gazing into a boundless universe.
My answer: infinity
The maximum distance one can see from the earth is 46Billion light years, making your answer nonsensical, nobody can see infinity.
You can see the past but cannot go there, you cannot see the future but you can go there.
- GenesisGT
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Re: Good at math or not?
oldtrucker wrote:
Uhhh. 13.35 Gly is it not?
Universe is 13Billion years old, that is the oldest light one can see, but the edge of the universe is 46B LYrs from Knox Mtn.
You can see the past but cannot go there, you cannot see the future but you can go there.
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Re: Good at math or not?
oldtrucker wrote:Good at math? Lets see if someone comes up with the answer for this super important, real world practical math question.---
---At the first lookout area up Knox Mountain...how far can you see line of sight in kilometers looking south assuming no surface obstacles ?
Show your work. Marks will be taken off if you don't.
Im gonna go with "C"
or maybe true....
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Re: Good at math or not?
GenesisGT wrote:but the edge of the universe is 46B LYrs from Knox Mtn.
Ahhhhh, the age-old human mistake of thinking we are the center of the universe.
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Re: Good at math or not?
We're not even near the centre of our own galaxy - and that's a very good thing for us.
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Re: Good at math or not?
oldtrucker wrote:A. 34.23km
B. 17.98km
C. 41.87Km
D. 49.02km
Answer C. Good job 'Jhunter199' ...you got it right!
Lookout 445m above sea level
Lake level 342m above sea level
103 m/338 ft above lake surface level
sq.root of 338ft =18.38
18.38 x 1.23 =22.61nm
= 41.87 kms
Next time you are at the first lookout at Knox Mountain you will know the super important info that you can see for 41.87 km.
I got a different answer, but I could be wrong, that if the elevation is 103m, taking into account the curvature of the Earth, you can see roughly 36.2km. I worked this out using trig and Pythagoras' theorem, both giving answers within a few mm of each other.
Radius of earth in m 6.371*10^6, a^2+b^2=c^2 a=distance from centre of earth to lake level (6371342m), b=distance from eyes to horizon(x), c=distance from eyes to centre of earth(6371445)
=> 6371342^2+x^2=6371445^2
=> x=(6371445^2-6371342^2)^0.5
=36228.54m
- GenesisGT
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Re: Good at math or not?
The wonder of math, both answers are correct.
41.8km is the radio horizon distance (radio horizon) =4.12 * height of the antenna(square root)
36.2km is the line of sight distance
41.8km is the radio horizon distance (radio horizon) =4.12 * height of the antenna(square root)
36.2km is the line of sight distance
You can see the past but cannot go there, you cannot see the future but you can go there.
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Re: Good at math or not?
oldtrucker wrote: Just thought I would come up with a really dumb practical math application for the Kelowna area.
Still, all very impressive answers