/sci/ - Science & Math

[Scia No.1545731]

Hello /sci/ I want to see how much /sci/ knows about astronomy/physics used in astronomy.
1.What are keplers 3 laws of planetary motion?
2.Name the 2 most prominent elements in the sun plus the state of matter the sun is in.
3.What is the dominant theory of how the moon was formed?
4.What is an AU in kilometers?
5.Name newtons 3 laws of motion.
6.Explain the Doppler effect?
7.How old is the universe?
8.Approximate the percent of water covering the earths surface.
9.If you dropped a helium balloon on the moon. and if it didn't pop due to extreme cold, heat, or pressure Would it float away or drop to the surface?
10.What is a parsec?
11.How did we determine the length of the astronomical unit?
12.Name two ways galileo proved heliocentrism.
13.What is the anual GDP of the world?
14.Explain the seasons.
15.Explain the phases of the moon.
16.What is the photoelectric effect?
17.Explain the basics of the special theory of relativity.
18.Explain the basics of the general theory of relativity.
19.Answer (20+30/2)^3-(50+3/3)^3
20.What is delta V
21.How far away from the sun is mars?
22.What are tidal forces?
23.Explain how solar systems are formed?
24.What event started the universe?
25.What process makes stars shine?
26.Name three types of telescopes.
27.Name 3 moons/planets where there migtht be life.
28.Why is the same side of the moon faces the earth?
29.What is a nebula?
30.What spectroscopy?

[Anonymous No.1545745]

no

[Scia No.1545757]

>>1545745
No to what?

[Josef @home !!nUf2NflSAyw No.1545761]

20.What is delta V
Delta? Laplacian? Difference? V? Vector field? Velocity? Vector space?

21.How far away from the sun is mars?
No idea. My guess is 3/4 the distance earth--sun

22.What are tidal forces?
Umm, fictious forces? Like gravity? :>

23.Explain how solar systems are formed?
Big gas cloud with angular momentum became denser over time

24.What event started the universe?
We don't have a theory describing how the universe formed

25.What process makes stars shine?
Emission of light. (Duh)

26.Name three types of telescopes.
Um. Terrestrial, mirror, .... infrared

27.Name 3 moons/planets where there migtht be life.
Titan Io Europa

28.Why is the same side of the moon faces the earth?
Something with phase locking. Never understood it or tried to. Is it an interesting concept?

29.What is a nebula?
Dunno. Gas cloud? Particle cloud? (Well, particles are pretty much gases in astronomy, I mean even galaxy clusters are fluids)

30.What spectroscopy?
Analyzing the spectrum of some emitter

[Anonymous No.1545758]

>>1545731
For Fucks sake, stop with this shit Scia.
This is not 'scientific literacy'. We established last time you did this.

[Anonymous No.1545770]

1.What are keplers 3 laws of planetary motion? gravity
2.Name the 2 most prominent elements in the sun plus the state of matter the sun is in. hydrogen and helium
3.What is the dominant theory of how the moon was formed? broke off of earth
4.What is an AU in kilometers? 150 million i believe
5.Name newtons 3 laws of motion.motion stays in motion, stationary stays stationary. equal and opposite
6.Explain the Doppler effect? coming towards you forces the waves to appear closer causing a shift in pitch
7.How old is the universe? 13.2 billion years
8.Approximate the percent of water covering the earths surface. 75
9.If you dropped a helium balloon on the moon. and if it didn't pop due to extreme cold, heat, or pressure Would it float away or drop to the surface? dropping implies a downward motion
10.What is a parsec? adick
11.How did we determine the length of the astronomical unit? earth to sun
12.Name two ways galileo proved heliocentrism. orbits of jupiter and moon
13.What is the anual GDP of the world? wtf this isn't sci related.
14.Explain the seasons. earths uneven heating
15.Explain the phases of the moon. same side facing earth, different areas getting lit
16.What is the photoelectric effect? i dont know
17.Explain the basics of the special theory of relativity.
18.Explain the basics of the general theory of relativity.e=mc(squared)
19.Answer (20+30/2)^3-(50+3/3)^3 fuck no
20.What is delta V change in velocity
21.How far away from the sun is mars? like 1.3 au
22.What are tidal forces? moons gravitational effect on water
23.Explain how solar systems are formed? fuckin magnets
24.What event started the universe? big bang
25.What process makes stars shine? nuclear shit
26.Name three types of telescopes. mirror, concave,
27.Name 3 moons/planets where there migtht be life.
28.Why is the same side of the moon faces the earth? rotation = orbit
29.What is a nebula? star related
30.What spectroscopy? observation of light and shit

[Anonymous No.1545769]

27.Name 3 moons/planets where there migtht be life.

ANY WILL DO BITCH BECAUSE THE PROBABILITY IS NONZERO IN EACH CASE.

[Anonymous No.1545775]

1. Bitches don't know about the doilies I wear around my neck.
2. The human element. The sun's state is mostly sunny.
3. Al Gore invented it.
4. The same as it is in miles.
5. Tom, Dick, Harry.
6. Music in the theater sounds like it surrounds you.
7. 6,000 yrs
8. Hardly any of it.
9. You'd die.
10. What isn't?
11. Take off an astronomer's pants and measure.
12. 1) Trolling the pope. 2) Flaming the pope.
13. 100%
okay, bored nao.

[Scia No.1545779]

>>1545758
Just seeing how much people know about astronomy
scientific literacy has nothing to do with it this time

[Anonymous No.1545781]

>21.How far away from the sun is mars?
>No idea. My guess is 3/4 the distance earth--sun

[Scia No.1545785]

>>1545761
http://en.wikipedia.org/wiki/Delta-v

[Anonymous No.1545787]

>>1545781

[Anonymous No.1545793]

1) Planets orbit in perfect circles, the sun orbits the earth, and the earth is flat.
2) Fire and air. The sun is in a gas state.
3) It was a captured asteroid.
4) Isn't Au a surname?
5) Something about heavier objects falling faster, can't remember all.
6) The what effect?
7) 5000 years or so
8) Like half.
9) It'd float because helium is lighter than the moon
10) I don't know.
11) As I said before, isn't Au a surname?
12) What is heliocentrism? It's just a geuss.
13) 2 million
14) Summer, Winter, Autumn, and Spring
15) Full moon
16) Photographs take electricity, that's why cameras require batteries.
17 and 18) I don't know.
19) 21
20) Delta is the first letter of the greek alphabet, V is the last letter of the english alphabet.

Too lazy to do the rest.

[Anonymous No.1545798]

>>1545787
lol wtf

[r̲̫͓͍͛̾o̻̦͊ͤͤͦ͗ͯ̆ͅỷ̢̪̜̗̤̦̻ͭ̎n͕͛̽ͮ !nEeEeEeeEs No.1545806]

1 bananas
2 H, He, fusion? wha
3 Theta crashing in young earth, splitting material gets formed into shape by gravity, stays in orbit, tada moon
4 8 light minutes
5 cba now
6 yeah when something comes to you the stuff is nearer together so you hear it more loudly thats with sound and when something goes away from you the waves are not so close so its not so loud.
7 approx 13,7 b of years
8 72
9 drop
10 a measuring unit , very long distance
11 median of sun->earth distance
12 yeah so he looked at some shit and then he thought maybe they are all wrong later he got into prison. serves him right
13 lolwat
14 earth stance . summer is RIGHT IN YO FACE sun and winter iss LOL where are you people????
15 yeah sometimes we see the moon but becuz its in a orbit we not always see him the same and at times not at all !
16 lolwat
17 lolwat
18 lolwat
19 lolwat
20change in velocity
21 pretty far away couldn't do it by car
22 sometimes the moon is very close to earth and sucks everything up (lol crazy )
23 matter revolving around a point of density ..
24 GOD
25 fission
26 cba to look up names in english
27 Earth Mars Europa
28 cuz it doesn't revolve around its own center lol crazy
29 forming stars, god this is easy
30 That spectroscopy

[Josef @home !!nUf2NflSAyw No.1545804]

>>1545785
Weird thing. Is it used in basic spacecraft models or something?

[Anonymous No.1545810]

>>1545787
QUALITY information

[Anonymous No.1545811]

>>1545804

or in calculus

[Anonymous No.1545813]

My question: Why will OP not fix this question?

8.Approximate the percent of water covering the earths surface.

[Scia No.1545815]

>>1545813
Too lazy

[Anonymous No.1545816]

1. Ellipses, area/sweep, a^2=p^3
2. Hydrogen (about 75% I think), Helium is most of the rest. Plasma
3. Protoplanetary collision and mass ejection
4. 150 million I think
5. Object at rest stays at rest, F=ma, equal+opposite reaction (I think?)
6. Moving towards a source emitting waves will shorten the apparent wavelength.
7. 13.7 billion years, around
8. Dunno. 75%?
9. Drop. Nothing to make it bouyant!
10. Parallax-second: distance away an object has to be from Earth to appear to shift one arcsecond in the sky as Earth goes from one point in its orbit to the opposite. I THINK.
11. Triangulation of some sort. Transit of Venus?
12. Saw moons around Jupiter... dunno :-/
13. no clue!
14. Seasons are caused by tilt in the Earth's rotational axis: summer occurs when we're tipped towards the sun and receive sunlight more directly.
15. Sun illuminates one half of the moon at (nearly) all times. We don't necessarily see all of this particular half at any given time.

[TAS No.1545818]

16. An EM wave of sufficient energy can dislodge an electron from an atom entirely.
17. Motion changes an object's size, mass, and "speed through time"
18. Gravity is does the above, because it is indistinguishable from a constantly applied force on an object free from gravitational influence
19. -82125
20. I assume you mean the change in V, which might be velocity
21. Damn it. I don't know off the top of my head. 200 million km?
22. A parent body will "tug" on its satellite, warping it slightly away from its "ordinary" spherical shape. This can cause tides (on earth), geology on the moon, and internal heating.
23. A gas and dust nebula collapses under its own gravity or is pushed to begin collapsing by a shockwave. Eventually the gas in the center becomes great enough to sustain core fusion, so a star is born. Meanwhile the other infalling matter will begin spinning fast enough to flatten into a disc. Gas an dust will tend to collect within the disc into planets. Solar wind will clear out the remaining gas and dust.
24. The big bang? :-/
25. Core fusion, of hydrogen when the star is main sequence, and of heavier elements late in the lifetimes of medium- and high-mass stars.
26.Can't! Parabolic, handheld, digital? lol..
27.This one's a bit silly and vague, but I'm hoping on Europa, Callisto, and Titan. Europa in particular.
28. It got tidally locked. The Earth too is slowing down rotation and approaching a tidally-locked state with the Sun. Though it might just achieve an orbital resonance like Mercury has.
29. Cloud of gas, dust, and other odd molecules out of which stars can form. Prominent in spiral galaxies and largely absent from ellipticals.
30. Spectroscopy is the ability to identify specific chemical elements in distant objects due to each element having a unique "fingerprint" of wavelength absorption lines when white light is passed through it.

[Anonymous No.1545825]

If I'm going to answer 30 questions, I'm going to require some sort of prize.

[Scia No.1545828]

>>1545816
>>1545818
You my friend pass

You're the only one to pass so far

[Scia No.1545836]

>>1545825
You get a free ego boost

[Anonymous No.1545846]

Gonna answer this without google or wiki because I'm bored.

>1.What are keplers 3 laws of planetary motion?
Can't remember

>2.Name the 2 most prominent elements in the sun plus the state of matter the sun is in.
Hydrogen and Helium

>3.What is the dominant theory of how the moon was formed?
An impact between the Earth and some other large object

>4.What is an AU in kilometers?
I'll estimate this using <span class="math">d=sxt[/spoiler] where <span class="math">s=3x10^8[/spoiler] and <span class="math">t=8x60[/spoiler].

<span class="math">144 000 000km[/spoiler]

I'm sure that's close

>5.Name newtons 3 laws of motion.
Law of inertia
<span class="math">F=MA[/spoiler]
Action-reaction law

>6.Explain the Doppler effect?
The apparent frequency of a wave changes as it moves past an observer and vice versa, in reality the frequency is constant.

>7.How old is the universe?
13 billion years

>8.Approximate the percent of water covering the earths surface.
70%

>9.If you dropped a helium balloon on the moon. and if it didn't pop due to extreme cold, heat, or pressure Would it float away or drop to the surface?
Drop to the surface

>10.What is a parsec?
Can't remember.

>11.How did we determine the length of the astronomical unit?
Distance between the Earth and the Sun, calculated as I did above.

>12.Name two ways galileo proved heliocentrism.
I'll try to guess this

Other planets appeared to orbit the Sun
The motion of stars in the nightsky

>13.What is the anual GDP of the world?
No idea.

>14.Explain the seasons.
Caused by the tilt of the Earth's axis

>15.Explain the phases of the moon.
Can't remember this

[Anonymous No.1545849]

>16.What is the photoelectric effect?
Emission of electrons from a metal plate when light of a certain wavelength hits it

>17
>18
Haven't studied relativity at all, don't need that shit for engineering!

>19.Answer (20+30/2)^3-(50+3/3)^3
-89776

>20.What is delta V
Don't know

>21.How far away from the sun is mars?
1.6 - 1.7 AU

>22.What are tidal forces?
Forces on the tides caused by the moon's gravitational pull

>23.Explain how solar systems are formed?
Formation of star
Halo of dust, gas and rock matter around the star
Dust + rock clump up together to form rocky planets
Gas collects to form gas giants
Asteroid belts formed for remaining dust

>24.What event started the universe?
The big bang

>25.What process makes stars shine?
Nuclear fusion I presume.

>26.Name three types of telescopes.
Reflector
Refractor
Infared

>27.Name 3 moons/planets where there migtht be life.
Europa
Titan
Enceladus

>28.Why is the same side of the moon faces the earth?
The moon doesn't rotate on its own axis?

>29.What is a nebula?
A gaseous star forming region

>30.What spectroscopy?
Studying the interaction between light and matter.

[Anonymous No.1545845]

>>1545818
>30. Implying spectroscopy doesn't work on nearby objects.
:>

[Anonymous No.1545856]

A delta-v is the change of velocity needed for orbit transfer

[Scia No.1545863]

>>1545849
>>1545846
and the engineer passes

also we measure the distance of the AU using trig and the transit of venus

[Josef @home !!nUf2NflSAyw No.1545873]

>>1545863
So you're an astronomer?

[Anonymous No.1545874]

>>1545828
Are you really that naive, tripfag? He probably used google

Also why does 30/30 the only grade that constitutes a pass?

[Scia No.1545879]

>>1545863
Astronomy autodidact
Im not a college/uni yet

[Anonymous No.1545884]

>>1545863
>also we measure the distance of the AU using trig and the transit of venus
Interesting, I didn't know that. Still just looking up the value now, I wasn't too far off.

[Josef @home !!nUf2NflSAyw No.1545893]

>>1545879
Ah okay. So on those AU, are they actually used?

[Anonymous No.1545891]

>>1545874
>30/30
>He didn't even understand about half the questions

[Scia No.1545900]

>>1545874
its not he just got most of the questions right
He got 21 wrong


oh and I forgot to delete 13. so it does not count.

[Anonymous No.1545901]

This was fun, I look forward to your next quiz Scia.

[Scia No.1545905]

>>1545893
In astronomy?
Yes the astronomical unit is used quite a bit
But only in solar system distances

[Scia No.1545908]

>>1545901
:D

[Anonymous No.1545917]

1: circular orbits, covered area is the same per unit of time, T²/d³ is constant
2: He and H, plasma
3: impact
4: about 8 light minutes, I could calculate how many km it is, but I just can't be bothered
5: F = dp/dt, the first is just the case where F = 0, F12 = - F21
6: the frequency of a wave changes according to the speed of the observer and the source
7: a lot? 15 Gyr, maybe
8: 75%
9: drop
10: a unit of distance
11: hell if I know, you could calculate it using orbital velocity, though
12: hell if I know, probably showing that it made much more sense than using eccentrics?
13: do I look like an economist?
14: the Earth's axis is slanted, amount of light received is not constant
15: the Earth partially covers the moon
16: light goes in, electrons come out
17: the speed of light is the same in all systems of reference
18: space-time is euclidean when no mass is present, gravity can be explained as a curvature of it
19: -89776
20: voltage difference, duh
21: further than the earth, that's for sure
22: gravitational attraction from the moon
23: gravitational collapse of a dust cloud
24: the big bang
25: nucular fusion
26: radio, ir and visible light
27: earth, europa, ???
28: very similar periods between revolutory and rotatory motions
29: a bunch of particles floating in the same region of space
30: the study of the properties of matter through their absorption or emission spectra, be it light or electrons

[Anonymous No.1545918]

I'm only going to answer #22, because it's the only question I haven't seen a decent answer to:

22. Tidal force is the difference in gravitational force exerted on a body's center of mass and its surface.

[Anonymous No.1545920]

1. Kepler I: a planet is in an elliptical orbit around its star and the star is at one of the foci.
Kepler II: the line connecting a planet to its star sweeps the same area during the same time
Kepler III: Some convoluted statement that I had to learn to prove for multivariate calculus but have since forgotten.
2. Hydrogen and helium. Plasma.
3. Early, hot molten Earth collided with another celestial body.
4. 150 million km, or 1.50 * 10^9 m.
5. Newton I: a = 0 => F = 0.
Newton II: F = dp/dt = d(mv)/dt = m*dv/dt = ma.
Newton III: For every action there is an equal and opposite reaction acting along the same line. I.e. momentum is conserved.
6. When the source of a wave is in motion relative to and observer the observer perceives the wave having a higher frequency.
7. 13.7 billion years give or take (I don't know the uncertainty by heart).
8. 70 %.
9. The Moon has no atmosphere to provide buoyancy. Hence the balloon drops to the surface.
10. A parsec is the distance to a star that has a parallax angle of one arcsecond, or some 30-ish lightyears. (1 pc = 1 AU/tan(1 arcsecond))
11. No idea.
12. Don't know.
13. GDP is not a scientific number.
14. The Earth is tilted away from the Sun. Hence at different points in its orbit sunlight has to pass through more or less atmosphere. Passing through more atmosphere => colder weather.
15. Uhm, has to do with how much of sunlight the Earth blocks right?

Questions 16-30 in another post.

[Anonymous No.1545923]

>>1545920

16. Photos hitting a metal surface cause electrons to be emitted, but only if the frequency of the photons is above a threshold. Amount of electrons emitted does not increase with frequency but with intensity.
17. The laws of physics are Lorentz invariant.
18. The laws of physics are the same in any reference frame. Spacetime is a four-dimensional manifold with curvature. Curvature and metric are determined by the mass and energy at each point in spacetime. Inertial motion is motion along geodesics (locally shortest paths) in this manifold, under the metric determined by the mass and energy content. (Matter tells space how to bend, space tells matter how to move.)
19. 35^3 - 51^3 = (35-5)
20. Depends on what V is. The difference in whatever quantity V is over some small interval of time. delta V could be an increase in volume.
21. Some 2 AU from memory.
22. Forces caused because of a difference in the gravitational force along a body. That is, the force is stronger in one end than in another.
23. From disks of gas, through gravitation.
24. Unphysical question.
25. Fusion, the proton-proton chain reaction more precisely. Well, that's the vast majority of the energy. But there are fusion chains all the way up to iron.
26. Pass
27. Mars, Europa, Titan.
28. Tidal locking. It happens because of gravitation and conservation of angular momentum.
29. A giant gas cloud in space where stars can form.
30. The study of the wavelengths of light emitted by matter. Basically, if you know what light it emits you can determine what it is. It's how we determine what stars are made of.

How did I do?

[Scia No.1545927]

>>1545920
>>1545923
You pass

you know more then me on some of the questions

[Anonymous No.1545929]

1.Who the fuck knows. Something involving gravity.
2.Helium & Hydrogen
3.Mars sized object crashed into earth
4.93,000,000 miles
5.Don't know shit about this one
6.As you observe objects that are moving towards or away from you, light is slightly compressed/expanded
7.13 billion years
8. 75%
9.It would drop to the ground
10.A unit of measurement used to describe the apparent size of a star in the sky
11.Mathmatics
12.
13.5 trillion buckaroos
14.Seriously?
15.Our vantage point of the moon is constantly changing
16.
17.
18.
19.4
20.
21.150 million miles
22.Gravity from external sources
23.Dust clouds grouping into stars and planets after a long time
24.Big Bang
25.The conversion of hydrogen to helium
26.Dobsonian, reflector, cassegrain
27.Mars, titan, ?
28.Locked orbit
29.A giant cloud of dust
30.The study of light wavelengths

[Anonymous No.1545938]

>>1545923
>19. 35^3 - 51^3 = (35-5)
Oops. Seems I forgot to work this out.
Let's see 35^3 = (30+5)^3 = 30^3 + 3*30^2*5 + 3*5^2*30 + 5^3 = 27000 + 13500 + 2250 + 125 = 30500 + 2375 = 42875.
51^3 = (50+1)^3 = 50^3 + 3*50^2 + 3*50 +1 = 125000 + 7500 + 151 = 132651.
Hence 35^3 - 51^3 = 32875 - 132651 = -100000 + 224 = -89776.

Fucking binomial theorem how does it work.

[Anonymous No.1545940]

>>1545927
What did I flunk?

[Anonymous No.1545946]

>>1545923
>19. 35^3 - 51^3 = (35-5)
Oops. Seems I forgot to work this out.
Let's see 35^3 = (30+5)^3 = 30^3 + 3*30^2*5 + 3*5^2*30 + 5^3 = 27000 + 13500 + 2250 + 125 = 40500 + 2375 = 42875.
51^3 = (50+1)^3 = 50^3 + 3*50^2 + 3*50 +1 = 125000 + 7500 + 151 = 132651.
Hence 35^3 - 51^3 = 42875 - 132651 = -90000 + 224 = -89776.

Fucking binomial theorem how does it work.

[Anonymous No.1545950]

>>1545920
>6. When the source of a wave is in motion relative to and observer the observer perceives the wave having a higher frequency.
>higher
Hm. I should change this to "higher or lower". Depends on the direction of the motion (towards or from the observer).

[Anonymous No.1545951]

>>1545927
Yeah, except he DOESN'T KNOW WHAT CAUSES THE FUCKING PHASES OF THE MOON. WTF?!!! THIS IS TAUGHT IN KINDERGARTEN. HE'S THE 3RD PERSON WHO DOESN'T KNOW THIS. WTF?!!!

[Anonymous No.1545955]

>>1545951
Do you remember everything you learned as a child?

I sure as fuck don't.

[Anonymous No.1545976]

>>1545951
Maybe it is taught in 3rd grade. Do you remember everything they taught you in 3rd grade? I've had better stuff to do than think about the phases of the moon since then, like learning calculus on my own.

[Scia No.1545985]

>>1545976

[Anonymous No.1545996]

I find it mindblowing that the old Newton laws are whats getting us into space. I was told that they actually use 3rd Kepler law to calculate periods for most of satellites with surprisingly small error. No relativist touch is needed to put a man on mars. Computers numerically integrate:

<div class="math">\Delta V=\frac{1}{m}\int \sum Fdt/eqn] and the laws of variations of fuel mass

and youre ready to go.

Definitely classical mechanics should be given more credit.</div>

[Anonymous No.1546002]

I find it mindblowing that the old Newton laws are whats getting us into space. I was told that they actually use 3rd Kepler law to calculate periods for most of satellites with surprisingly small error. No relativist touch is needed to put a man on mars. Computers numerically integrate:

<div class="math">\Delta V=\frac{1}{m}\int \sum Fdt</div> and the laws of variations of fuel mass

and youre ready to go.

Definitely classical mechanics should be given more credit.

[Anonymous No.1546011]

>>1545976
How can you forget that the moon is a sphere that is lit of from one side?

[Anonymous No.1546013]

>>1545985

[Scia No.1546015]

>>1546013

[Anonymous No.1546022]

>>1546011
When you were 10, were you more interested in your N64 or if the moon was a sphere lit from one side?

Yeah...
>>1546002
Ssssshhh! If it became known that Newton discovered rocket science 300 years before anyone built a rocket, rocket scientists couldn't feel superior!

[Anonymous No.1546025]

>>1546015

[Anonymous No.1546026]

>>1546002
Yep. Newton da man. Imagine, the best scientist in history... a christfag.

[Scia No.1546032]

>>1546026

[Anonymous No.1546035]

>>1546022
>If it became known that Newton discovered rocket science 300 years before anyone built a rocket, rocket scientists couldn't feel superior!

That's like saying that Democritus invented atomic physics.

[Scia No.1546039]

>>1546035
Hh came up with the idea of an atom first didn't he?

[Anonymous No.1546049]

>>1546039
Indeed, he pioneered the concept but not much more than that. But it's not like Newton only came up with concepts such as force and energy. He described them mathematically and invented the tools to that too.

[Anonymous No.1546055]

>>1546039
And? Coming up with a theory is one thing, properly applying it to a real problem is another.

[Anonymous No.1546059]

>>1546039
He also came up with the idea that the earth was flat, and that the old Pythagorian idea of a spherical earth was superstition.

[Anonymous No.1546092]

1. no
2. hydrogen, helium, plasma
3. another planet hit earth
4. no
5. one is inertia, one is equal and opposite reaction, and no.
6. waves are higher frequency when an object is approaching, lower when it is going away.
7. 13.5 billion years
8. 66%
9. drop
10. unit of distance used for interstellar travel
11. no
12. no
13. no
14. earth's tilt, causes areas on the earth to get relatively less or more sunlight depending on position vs. the sun
15. we orbit the sun and the moon orbits us at different speeds. sometimes sun is right behind the moon (new moon) or on the side behind us (full moon)
16. light can move electrons, or excite the, or something.
17. no
18. no
19. -89776
20.change in velocity?
21. further than the earth
22. shifting in the tide caused by the moon.
23. bunch of dust>bunch of dust plus black hole> bunch of stars and black hole> solar systems and black hole
24. quantum fluctuations
25. nuclear fusion
26. don't know the names
27. europa, mars, no
28. the fuck?
29. cloud of gas in space
30. no

[Scia No.1546311]

bamp

[Anonymous No.1546331]

Damn it Scia, here you go again...

[Anonymous No.1546441]

2. He, H and uhh...no idea.
7. 11 bil?
8. 70 to 80%
9. I'm going to guess drop
10. Measurement of distance
14. Involves the tilt of the earth around its axis.
21. > distance of earth to sun
23. Similar to how a sun is formed
24. Big bang
25. Fusion of H -> He in the core
27. Mars, Europa, no idea of the last
29. Big cloud of dust sitting somewhere in space

[Anonymous No.1546713]

Question:
I learned that a parsec is the distance needed to be able to see 1 AU in 1 arcsecond. (3.2ly?)

Some answers in here state roughly the same, but still a little different. Can anyone give me a confirmation on which definition is the most accurate?

[Anonymous No.1546755]

1. i) all planets orbits around the sun are ellipsoids ii) same area covered with same time travelled with plantery orbits or something iii) the a^3 ~ t^2 I think it was.
2. Hydrogen and Helium, Plasma.
3. Collision with earth and some asteroid.
4. 150 000 000 km
5. i) Inertia ii) f = dp/dt iii) action = -reaction
6. velocity of the source influences frequency of waves received by observer.
7. 14~ gigayears
8. 70%
9. Drop.
10. 3.16 lightyears.
11. Length to the sun, probably parralax?
12. -
13. -
14. The way the earth is tilted with respect to the sun.
15. How much of it is 'lit' by the light of the sun.
16. Photons scattering from metal.
17. Speed of light is constant in every frame.
18. Mass bends spacetime?
19. too lazy
20. change in volume?
21. further than earth
22. forces exerted due to masses being spherical, thus not every particle receives an equal amount of gravitational force.
23. Accretion disc.
24. Big Bang most probably.
25. Fission.
26. -
27. Europa, Titan
28. Tidal Locking
29. -
30. -

[Scia No.1546798]

>>1546331
that i do old bean

[Waffle !!ky91Zx/tbZW No.1547010]

1. Don't know.
2. Hydrogen and helium.
3. A piece that broke off earth.
4. A what?
5. If an object has a constant velocity, the sum of forces working on it is zero. The sum of forces on an object equals mass times acceleration. Every reaction has an opposite reaction/ever force has an opposite force.
6. If an object travels towards you or from you, it's sound/light wavelength increases/decreases.
7. Around 13 billion years?
8. Around 60% I think.
9. Drop.
10. It's a unit for time, not for length as most believe?
11. It has something to do with some kind of waves and trigonometry when measuring the distance to a planet/star?
12. Helio-what?
13. GDP?
14. ...
15. Waht
16. Omfg, can't remember.
17. Haven't really been into this at school yet, I know only that energy equals mass times the speed of light squared.
18. Again, haven't had this in school yet. But I know that not even light can escape from gravity, and that nothing can go faster than the speed of light.
19. -89776
20. Change in velocity.
21. Don't know.
22. Change in distance between earth and the moon which changes the gravity the moon affects earth with.
23. Gravity gets really strong in a gass cloud and a starts fusion processes and creates a star. Other planets are formed the same way (?) and starts rotate the star.
24. Some thinks it was another universe that imploded. Several theories.
25. Nuclear fusion.
26. Telescopic, infrared?
27. Europa, Mars, ?
28. No idea.
29. Giant gas clouds?
30. Can't remember

[Anonymous No.1547028]

this is stupid.

>google.com

idiots.

[Anonymous No.1547071]

I knew every single one, except by 13 which I supposed to be around 13 trillions and it was actually 58, but how is this even related to astronomy anyway? And 20, what is delta V? It can mean A LOT of things, you didn't specify what.

[Anonymous No.1547307]

Field to fucking long.

1. No idea. Something to do with eclipses.
2. Hydrogen, Helium, Plasma
3. Knocked off the Earth by a Mars-sized object
4. Light's 300,000 km/s, the Sun's about 8:20 light mins from Earth...That's about 150,000,000 km, I guess
5. Stuff continues at it's current velocity is no forces are acting on it, every force has an opposite and equal reaction, f = m * a
6. Waves bunch up in front of a moving object, increasing frequency, and spread out behind.
7. About 13-14 billion years.
8. Somewhere around 70%, I think.
9. Drop. There's no atmosphere for it to float in.
10. Parallax second. Distance of a star that moves one arc-second across the sky from two points of observation on the Earth 6 months apart.
11. Measuring the distance to Mercury/Venus via radar and working out the distance to the point they were orbiting around.
12. The Jupiter's moons thing is the only one that springs to mind for me.
13. No idea. Few trillion USD, I guess.
14. Tilt of the Earth leading to different intensities of light at different times of the year.
15. The Sun only lights up the Side of the Moon facing it.
16. Something to do with electrons hitting a plate and more electrons being knocked off it or something, I can't remember.
17. Time is relative, speed of light is constant for all observers, etc.
18. Gravity as dents in spacetime.
19. -16^3?

[Anonymous No.1547324]

>>1547307

20. Change in velocity
21. Bugger if I know. A a fair bit further out than us, so somewhere around 200 million km?
22. Gravity acting towards a point , stretching out objects orbiting another object.
23. Dust and shit accreting while orbiting stars.
24. The Big bang
25. Fusion, or rather the Heat from fusion radiating off the upper layers as visible light.
26. Newtonian, something and something.
27. Europa, That one orbing Saturn beginning with an E as well. After that, I guess titan is the next best candidate.
28. Tidal locking
29. Big blob of gas in space.
30. Looking at what wavelengths of light things absorb/reflect to work out what it's made of.

You could have made that quiz a little smaller. Some of the questions seemed like that were asking for a bit of a long-winded explanation, as well.

[Anonymous No.1547464]

1.1) Planets move in elipses with the star at one of the foci
2) Not exactly sure how to word it but planets trace out equal areas in equal times in their orbit.
3) uh...
>2.Hydrogen, Helium; plasma
>3.A big rock smashed into the earth and carved the moon out
>4.about 92 million miles. fuck your measurement system.
>5.1) an object at rest will remain at rest, unless acted upon by an outside force
2) an object in motion will remain in motion, unless acted upon by an outside force
3) uh...
>6.peaks in a sound/light wave travel at a constant speed through a uniform medium. when their point of origin is moving relative to some observer, the peaks will be either compressed or spaced further apart depending on your position relative to the moving point of origin. result is that things sound/look different when coming towards you than when they're going away or sitting still
>7.6000 yeers, where 1 yeer is 2 million years
8.70%
>9.fall to the surface, unless you're at a really low altitude then there might be enough xenon around to make it float a little bit.
>10.kinda like a lightyear but bigger
11.DGAF
>12.NFI
>13.about 70 trillion USD
14.In the hotter seasons, the rays from the sun hit one hemisphere of the earth more directly than in the colder seasons. think shining a heat lamp on a table. if you shine it straight down, it will burn the table, but at an angle, nothing happens.

and this my capcha. how the fuck do you type this.

[Anonymous No.1547469]

>>1547464
15.the earth and moon are light by the same point. we're only able to see the parts that are illuminated by the sun.
16.dunno but i'll bet it's what solar panels use.
17.lolwut
18.I'm not walking, the universe is moving around me
19.PITA
20.a
21.about 2 AU
22.the gravity of an orbiting body effects the body it is orbiting; the moon effects the earth, the earth effects the sun
23.cloud of dust and gas coalesce into a star and planets
24.we don't know
25.fuse together 2 atoms, release photon.
26.one which amplify light waves, ones which amplify radio waves, uhhh
27.Mars, Titan, Io
28.well 'tidal locking' would be a tautology. I'm guessing that one side of the moon is heavier than the earth so it's more strongly attracted to the earth?
29.a big fucking cloud
30.every element reflects light only of a certain wavelength. analyzing that wavelength can tell us what any light-emitting object is made of

[Anonymous No.1547485]

Know most of this stuff, too lazy to answer though.

[Anonymous No.1547575]

all those questions and more can be answered by AstronomyCast. And may I say, Pamela Gay is a foxy dominatrix. /thread

[Scia No.1547630]

At least most of /sci/ knows this stuff

[Anonymous No.1547682]

31. Why is the sky blue?

[Scia No.1547688]

>>1547682
Reighley scattering

[CommandCenter !!+V9m0oOVCEr No.1547693]

>>1545745

[Anonymous No.1547697]

>>1547688
Correct. Why not fill your list of questions with good ones like this instead of trivial ones like 9 and 24?

[Scia No.1547700]

>>1547697
9 is a /sci/ joke
24 people need to know