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homework help!!!!!!!!!

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Re: homework help!!!!!!!!!

Postby rdsrds2120 on Sat Aug 25, 2012 9:23 pm

saxitoxin wrote:
rdsrds2120 wrote:
saxitoxin wrote:This question is worth 49 SaxBucks:

x, sin2 (3x) + cos2 (3x) =


I don't know what you mean by the "x," but

sin2 (3x) + cos2 (3x) = 1

-rd


I meant to write ---

For all real numbers x, sin2 (3x) + cos2 (3x) = ???


Answer's still the same.

BigBallinStalin wrote:You must use pen and paper.

And, you have <90 seconds to solve the following:


The following repeats itself: 0.0653906539

What would be the 68th digit?


You don't have to use pen and paper. Mental math is fine, the answer is 5.

saxitoxin wrote:Last chance, for 120 SaxBucks ...

cos^2 Īø csc Īø sec Īø =


cot Īø

-rd
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Re: homework help!!!!!!!!!

Postby saxitoxin on Sat Aug 25, 2012 9:25 pm

rds +210 SaxBucks
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Re: homework help!!!!!!!!!

Postby rdsrds2120 on Sat Aug 25, 2012 9:41 pm

saxitoxin wrote:rds +210 SaxBucks


Image

-rd
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Re: homework help!!!!!!!!!

Postby Phatscotty on Sat Aug 25, 2012 10:28 pm

snake242 wrote:My question is how has sports paved the way for desegregation in the united states?

can u guys give some examples or sources :?:


Everybody does Jackie Robinson. Go for the A



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Re: homework help!!!!!!!!!

Postby saxitoxin on Tue Nov 06, 2012 11:35 am

Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.
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Re: homework help!!!!!!!!!

Postby ManBungalow on Tue Nov 06, 2012 2:03 pm

saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.

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Re: homework help!!!!!!!!!

Postby bedub1 on Tue Nov 06, 2012 2:13 pm

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Re: homework help!!!!!!!!!

Postby DoomYoshi on Tue Nov 06, 2012 2:56 pm

saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).
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Re: homework help!!!!!!!!!

Postby saxitoxin on Tue Nov 06, 2012 3:18 pm

DoomYoshi wrote:
saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).


OK, the star is Proxima Centauri and the nurse weighs 70kg.
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Re: homework help!!!!!!!!!

Postby DoomYoshi on Tue Nov 06, 2012 6:23 pm

Actually, never mind. I can give you an answer in Newtonian mechanics using Gravity as a Force. But then Einstein showed up and ruined everything, making gravity not a force and I stopped studying physics after first year. You would have to ask a real physicist for an actual answer. Sorry, saxi, I hate to let you down.
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Re: homework help!!!!!!!!!

Postby maxfaraday on Tue Nov 06, 2012 8:35 pm

DoomYoshi wrote:
saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).


The closest star is Alpha Centauri, you can easily find info about it on wikipedia.
As for the nurse, just estimate roughly the weight and distance.
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Re: homework help!!!!!!!!!

Postby Dukasaur on Tue Nov 06, 2012 10:35 pm

maxfaraday wrote:
DoomYoshi wrote:
saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).


The closest star is Alpha Centauri, you can easily find info about it on wikipedia.
As for the nurse, just estimate roughly the weight and distance.

Make the nurse 150 kg. And make her a wet-nurse. And multi-orgasmic. And a Valkyrie.

Make the star Betelgeuse. No, make it Beetlejuice. Ah, hell. Just make it Micheal Keaton.

Now put them in a bathtub. With Archbishop Makarios.
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Re: homework help!!!!!!!!!

Postby Metsfanmax on Fri Nov 09, 2012 8:06 pm

saxitoxin wrote:
DoomYoshi wrote:
saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).


OK, the star is Proxima Centauri and the nurse weighs 70kg.


The average human's force of pushing/pulling is on the order of 100 Newtons (this is an SI unit). Proxima Cen is about one-tenth the mass of our Sun, and a distance of 1.3 parsecs. Assume the baby has a mass of 3 kg. In SI units, the gravitational force is 3 x 10^(-14) Newtons. Or, in scientific parlance, really f***ing small. The nurse is about 100 trillion times stronger than the star.
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Re: homework help!!!!!!!!!

Postby Haggis_McMutton on Fri Nov 09, 2012 8:21 pm

Metsfanmax wrote:
saxitoxin wrote:
DoomYoshi wrote:
saxitoxin wrote:Calculate what would have a larger force on you when you were born: a nurse in the delivery room or a star (excluding the Sun) in the sky.


In the sky, like in the atmosphere? The first force I went to calculate has a few parameters missing: size of star/nurse, distance of star/nurse (nurse is estimatable).


OK, the star is Proxima Centauri and the nurse weighs 70kg.


The average human's force of pushing/pulling is on the order of 100 Newtons (this is an SI unit). Proxima Cen is about one-tenth the mass of our Sun, and a distance of 1.3 parsecs. Assume the baby has a mass of 3 kg. In SI units, the gravitational force is 3 x 10^(-14) Newtons. Or, in scientific parlance, really f***ing small. The nurse is about 100 trillion times stronger than the star.


I think saxi is asking if the gravitational force exerted by the nurse or that exerted by the star is larger. (hopefully it's pretty clear that a human actually pulling something exerts more force on that object than proxima centauri does)

If my calculation is right the nurse actually exerts more gravitational force by about 6 orders of magnitude (assuming she's standing within 1-2 meters of the baby)
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Re: homework help!!!!!!!!!

Postby Metsfanmax on Fri Nov 09, 2012 8:36 pm

Haggis_McMutton wrote:I think saxi is asking if the gravitational force exerted by the nurse or that exerted by the star is larger.


Well, saxi's pretty old. You can never be sure with him.

(hopefully it's pretty clear that a human actually pulling something exerts more force on that object than proxima centauri does)


Is that necessarily obvious to someone who doesn't know the intrinsic strength of the gravitational force? I don't see why.

If my calculation is right the nurse actually exerts more gravitational force by about 6 orders of magnitude (assuming she's standing within 1-2 meters of the baby)


Yes, that is correct.
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Re: homework help!!!!!!!!!

Postby saxitoxin on Sat Nov 10, 2012 2:34 am

Would it be the same if it were BBS instead of a nurse (assume BBS also weighs 70kgs)?

How did you arrive at a factor of six, Haggis/Max?
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Re: homework help!!!!!!!!!

Postby Haggis_McMutton on Sat Nov 10, 2012 8:39 am

Metsfanmax wrote:
(hopefully it's pretty clear that a human actually pulling something exerts more force on that object than proxima centauri does)


Is that necessarily obvious to someone who doesn't know the intrinsic strength of the gravitational force? I don't see why.


Hmm, well if proxima centauri exerted that much force then the force exerted by our sun would have to absolutely dwarf the pulling power of a human, so then I guess you'd expect to see objects wildly flying about as the earth gets closer or farther away to the sun.

Though yeah, maybe it's not obvious if you've never thought about it / have no idea how gravity works.

saxitoxin wrote:How did you arrive at a factor of six, Haggis/Max?


Gravitational force between object 1 and 2 situated at distance d is roughly g*mass1*mass2 / d^2

So force exerted by star divided by force exerted by nurse is: mass_star * dist_nurse^2 / (mass_nurse * dist_star^2 ).
mass of proxima centauri is 0.123 solar masses = ~ 2.5 * 10^29 kg
distance to proxima centauri is 4.24 light years = 4 * 10^16 meters
mass of nurse is 70kg
assume distance to nurse is 1m
Plug those in and you get that force_star / force_nurse = ~ 2 * 10^-6. So the force exerted by the nurse is about a million times stronger than that exerted by the star.

saxitoxin wrote:Would it be the same if it were BBS instead of a nurse (assume BBS also weighs 70kgs)?


As an economist BBS is not allowed within a 1 mile radius of any maternity wards. Modifying the distance to BBS from 1 meter to 2000 meters actually means proxima centauri would have a sliightly stronger gravitational pull on the baby than BBS would.
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Re: homework help!!!!!!!!!

Postby Timminz on Sat Nov 10, 2012 10:35 pm

Haggis_McMutton wrote:
saxitoxin wrote:Would it be the same if it were BBS instead of a nurse (assume BBS also weighs 70kgs)?

As an economist BBS is not allowed within a 1 mile radius of any maternity wards. Modifying the distance to BBS from 1 meter to 2000 meters actually means proxima centauri would have a sliightly stronger gravitational pull on the baby than BBS would.


What if BBS was right at the legal limit of 1600 metres?
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Re: homework help!!!!!!!!!

Postby Metsfanmax on Sat Nov 10, 2012 10:36 pm

Timminz wrote:
Haggis_McMutton wrote:
saxitoxin wrote:Would it be the same if it were BBS instead of a nurse (assume BBS also weighs 70kgs)?

As an economist BBS is not allowed within a 1 mile radius of any maternity wards. Modifying the distance to BBS from 1 meter to 2000 meters actually means proxima centauri would have a sliightly stronger gravitational pull on the baby than BBS would.


What if BBS was right at the legal limit of 1600 metres?


Not possible, according to the uncertainty principle.
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