Science Lies

>>7807723
>Earth's escape velocity is 40,270 km/h
>The space shuttle's maximum speed was 28,968 kilometers per hour
>people actually believe space travel has actually happened.

>>7807731
>40,270 km/h

kek

>>7807731
Listen you brainlet, if you travel upward at a speed of 1mph for a billion years you're going to escape earth's gravity. Now extend that analogy to spacecraft, and think about what escape velocity actually means versus what happens with spacecraft.

>>7807723
not sure if trolling
can someone explain when a temperature can be less than absolute zero?

particle vibration can only have a magnitude not a direction so how can temperature be negative?

>>7807768
>how can temperature be negative?
I guess water never freezes then uh?

>>7807768
This article explains it nicely:
http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/neg_temperature.html

There's also a wiki page on temperatures below absolute zero, but which doesn't explain the phenomenon as well:
https://en.wikipedia.org/wiki/Negative_temperature

>>7807778
Moron.

>>7807778
Sick burn.

Try to explain that, nerd.

>>7807786
thanks for the read

>>7807778
kelvin not celsius baka desu

>>7807768
It's actually not a difficult concept to grasp, but the use of "temperature" pertains exclusively to energy within physical systems, rather than a hot or cold scale.

>>7807778
He meant Kelvin you dumbwit

Bump for more science lies.

>>7808513
Upvoted, for more science lies

Math lies:
>you can't take the square root of a negative number
>you can't take a log of a negative number
>matrices don't have much of a purpose (precalc teacher hated half of what she taught)
>du/dv * dv/dw = du/dw because you cross out the dv's (teacher had an engineering degree)
>calculators use Taylor polynomials to do sin,cos,tan (same engineering teacher, ironically)
>i is defined as the principal root of -1
>convention and writing order matters more than the result (like a+ib vs a+bi)
>if f(x)->L as x->c, f(c)=L, therefore 1/infinity = 0 (again, engineering degree)

Science lies:
>pluto is a planet
>the sky is blue because it's a reflection of the ocean
>the north pole is the magnetic north pole
>light is a wave
>light is a particle
>spending the first eighth of the year, every year, doing unit conversion labs is a good use of your time
>centrifugal force is a real force
>electricity goes from positive to negative (why the fuck is it taught like that anyway)

That's all I can think of.

>>7808738
>math lies
No, people lie about math. There's a difference.

>parallel lines never cross
> VSEPRT and hybridization

>>7807731
>Obviously they beam a picture of the ISS into the sky so that when amateurs astronomers look at it through their telescopes it's there.

>>7808738

>calculators use Taylor polynomials to do sin,cos,tan (same engineering teacher, ironically)
>i is defined as the principal root of -1

Explain these, I thought this was the deal

>>7808766
I had a teacher that always said, that parallel lines cross in the infinity

>>7807731
>he believes that escape velocity has to be achieved in order to escape earth's orbit

nigga you could go straight up at 1 m/s and eventually escape earth's orbit, it would just take a long time

>You can't have fermions w/ integer spin in your theories

Nice try physical reasoning.

>>7808870
that requires acceleration

>>7807723
>You can't have negative pressures

https://www.youtube.com/watch?v=BickMFHAZR0

>The glass in old buildings is thicker at the bottom because glass is a liquid and slowly flows down

>>7807778
Fucking kek.

>>7809028
Explain yourself

>>7808929
>what is fuel

>>7808759
i think he means lies in math, not that an inanimate field of study lies to people

>>7807731
Holy shit, escape velocity =/= orbit. Escape velocity = leaving the earth's sphere of influence entirely. As for all you other would be cosmonauts, go google delta-v I mean do you even kerbal.

>>7809096
>eaving the earth's sphere of influence entirely.
but that's impossible, there will be always a bit of influence. It's not like gravitons suffer friction

>psychology is valid

>>7809123
Technically, whenever the influence of earth's gravity is less than i planck length then it stops meaning anything physically. So gravity does have a finite range.

>Black holes have a singularity.

>>7809123

In practice, at a certain velocity/altitude, an object would break earth orbit and fall into a solar orbit. That's the point we're talking about when we talk about sphere of influence.

>>7808865
Chebyshev
CORDIC

>>7808738
>du/dv * dv/dw = du/dw because you cross out the dv's (teacher had an engineering degree)
My physics professor in the second semster said about that kind of thing something among the lines of "It's high level math, just believe that what I do is right."

File: 1451969309165.jpg (44KB, 639x628px) Image search: [Google]

44KB, 639x628px

>>7809201
>basic algebra is high level math

you should have stood up and laughed as you explain how basic algebra is in no way "high level".

>>7809201
>>7809214
I remember doing something similiar, but it was correct

>>7809123
>>7809149
I think Wikipedia explains it pretty well.

'In physics, escape velocity is the minimum speed needed for an object to "break free" from the gravitational attraction of a massive body ... At escape velocity the object will move away forever from the massive body, without additional acceleration (like propulsion) applied to the object. As the object moves away from the massive body, the object will continually slow and asymptotically approach zero speed as the object's distance approaches infinity.'
https://en.wikipedia.org/wiki/Escape_velocity

>>7807731
No.
The escape velocity of any body can be given by v=sqrt(2Gm/R)
Where m is the mass of the body and R is the radius
Plug the variables in for earth and you find the earth's escape velocity is closer to 11.2 km/s

>>7808738
>can't have sqrt of negative
Not in the real number line you can't
>convention and writing order
It's good practice to write your math in a way that's easy to review

>Pluto is a planet
it was until we changed the definition

>the sky is blue because it's a reflection of the ocean
You what? I never heard anyone say that

>north pole is magnetic north pole
1.)geography, not even once
2.)Close enough

>light is a wave
>light is a particle
No, light is superman

>unit conversion labs
That's what you get for being retarded and not adopting SI, cunt

>centrifugal force
Sometimes lies can be useful, but again,.no one ever said that centrifugal force exists

>electricity goes from positive to negative
What are semiconductor holes? And it's charge, so if electrons have negative charge then there's nothing wrong with saying charge goes from the positive to negative
(because Benjamin Franklin)

>>7809080
Not him but
>back in the olden days when glass manufacturing technology wasn't as good as today,you'd often find that your sheet of glass isn't perfectly flat, and thicker on one end than the other
>you're a wagekuk builder who needs to put in a sheet of glass in a window pane
>do you put the heavier, thicker part on the bottom or on the top

>>7807786
That math article
>what is a paragraph?

>>7809270
>No, light is superman

makes sense

>>7809275
Glass, an amorphous solid, will given long enough settle.

File: tipping1.jpg (28KB, 437x437px) Image search: [Google]

28KB, 437x437px

>>7809128
nice meme

>>7809169

OK, I don't know what that is, are you trying to say there's less computationally intensive algorithms for computing transcendental functions than Taylor series approximations?

But have Taylor series ever been used at some point in computers and calculators, just not nowadays?

>>7810097
Yeah but not by an appreciable amount in our lifetimes. If it did, telescopes couldn't exist

>>7810262
>implying modern glass is the same as early glass
>implying most high level optic systems use glass at all and not some crystal
>implying 200-300 years=lifetime
Kid, you found out that glass isn't a liquid. Congrats. That doesn't mean that some of what you've heard suddenly becomes untrue.

>>7808738
>>du/dv * dv/dw = du/dw because you cross out the dv's (teacher had an engineering degree)
Reality is continues so it's fine, only mathematicians have a problem with this.

>>7809201
This is just the chain rule though

>>7810419
If I recall correctly, one of those was a partial derivative, while other wasn't. Maybe that's why I remember it, but not the details surroundng it.

>>7807778
Are you autistic? What do you think absolute zero means? Do you even Kelvin

You can't leave earth because gravity always pulls you back down

That's why no matter how high I jump I always fall back down, space flight is just a myth

File: 1447106195586.jpg (70KB, 500x375px) Image search: [Google]

70KB, 500x375px

>>7810477
Your soul is pulled down by gravity.

>>7808865
i is defined as the number such that i^2=-1, so i and -i are both solutions to that.

Math lies:

http://mathoverflow.net/questions/35468/widely-accepted-mathematical-results-that-were-later-shown-wrong

>>7810483
Y y you mean I wont go to heaven?

>>7810134
as far as I know, yes

>pee is not stored in scrotum

>>7812442
>ejaculate is stored in the scrotum

Oh, wait, that's porn lies.

Actually certain noble gasses can form some compunds ( such as XeF2)

>>7812741
wow so I guess the statement
>Noble gasses don't form compounds
would be a lie then :^)

>Newton's second law is F = ma

>>7809270
>What are semiconductor holes?
Literaly don't exist.

>>7807778
Protip: Use Kelvin

Boop