Questions

[SpeedyWorm1]

Well some of you will and some of you won't remember me, but its speedy again with some questions. As some of you know im 13. I get the top grade in science for my school, and this question has been puzzling me and my teacher, for she says it has to do with the Einstien's theory of realtivity and stuff. Why does all mass create gravity? If you eject say a bowling ball and a golf ball into space, the golf ball will be drawn to the bowling ball [if there were no bigger masses anywhere near]. Also is there anyway to prove this? I'd like to chose it for this HUGE project we need to do, and you need something that you can prove.

2nd question: Whats the best way to ask someone out if you never get the chance to ask them in person?

3rd question: What do you do if there's a girl whos like your best friend, and you don't know how she feels about you, but you think you like her as more than a friend?


Any replies are appreciated!

[GrassDragon]

The golf ball and the bowling ball are actually attracted to each other; not just the small one to the large one. Gravity is caused by depressions in space-time. They affect more than just physical objects though; gravity also affects the speed of the flow of time.

Here's something you could do. The gravitational constant was originally calculated by an experiment with a setup similar to this:

http://www.engineering.com/content/community/library/sciencelaws/newtonslawofgravity/images/gravitational_constant.jpg

The mirror is attached to a swivel with a long bar on the bottom. The bar has weights on either end. A light is shined at the mirror so that it reflects on to a scale. All of this is allowed to rotate freely. The blue weights in the image could be on the edge of a stick, and when you move the two round weights together, the contraption swivels, and you can measure this change on the light scale. The constant is calculated from the masses of the two weights and the distance when the light change is measured.

I don't know if you could replicate the experiment, but there's some background info anyway.

EDIT: As to your girl problems, if you never get the chance to ask her out, when will you have the chance to go out with her?

[SpeedyWorm1]

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EDIT: As to your girl problems, if you never get the chance to ask her out, when will you have the chance to go out with her?


I would have time to go out with her, but I never have privacy to actually ask her out [we only talk at school]. I could REALLY use some help with question 3 guys.



EDIT: I was told by my teacher that the small object is drawn to the larger object. The larger object will stay in the same position and the smaller object would just drift towards it. Thus, how Earth has gravity. If you are correct, wouldn't say, any airplane move closer to Earth while drawing the Earth closer to it?

[CODEZERO]

um you could ask her friends the closer ones always seem to know the inner stuff but the thing is with the closer friends they'd probably tell the girl you like, what you asked

[SpeedyWorm1]

um you could ask her friends the closer ones always seem to know the inner stuff but the thing is with the closer friends they'd probably tell the girl you like, what you asked


Great idea, but already thought about, and decided not to just for that reason. If she wouldn't want to go out with me, I wouldn't want to ruin the friendship.

[GrassDragon]

EDIT: I was told by my teacher that the small object is drawn to the larger object. The larger object will stay in the same position and the smaller object would just drift towards it. Thus, how Earth has gravity. If you are correct, wouldn't say, any airplane move closer to Earth while drawing the Earth closer to it?
They exert a force on each other. The larger object will move, but it may not be noticeable due to its mass. The airplane actually does draw the Earth towards it, but because the Earth is so massive you can't measure the movement.

[SpeedyWorm1]

They exert a force on each other. The larger object will move, but it may not be noticeable due to its mass. The airplane actually does draw the Earth towards it, but because the Earth is so massive you can't measure the movement.



Thanks man. You should try and get a job as a science teacher, cause mine is awesome and your smarter than she is. One thing I might need to know however, is WHY they exert force on each other. I can prove it, but I'll need to write something on why they are attracted to each other. Can you help me with that?

[GrassDragon]

It's flattering you think I'm smarter than your teacher, but these are pretty basic concepts. Maybe your teacher just hasn't gotten to all of this yet. I'm not even completely through my highschool physics course :P

As for what causes gravity...

While a great deal is known about the properties of gravity, the ultimate cause of the gravitational force remains an open question.
Source: http://en.wikipedia.org/wiki/Gravity

[Toucan]

They exert a force on each other. The larger object will move, but it may not be noticeable due to its mass. The airplane actually does draw the Earth towards it, but because the Earth is so massive you can't measure the movement.
We detect planets orbiting distant stars by the "Warble" effect the orbiting planet has on the star (the star slightly moves from side to side), one example where the effect of a smaller object on a much larger object can be observed.

[GenocideAlive]

What do you do if there's a girl whos like your best friend, and you don't know how she feels about you, but you think you like her as more than a friend?
This is pretty much a "play it cool" scenario. When you're hanging out or talking your object will be to let on not-so-subtley that you have an interest in her. Open doors for her, pull out her chair, offer to help carry her books, etc. Usually you can tell by the way a girl receives these things from you how she feels about you.

If she likes it, is very receptive, smiles, and does the giggle bit, things are looking up. Ask her how she'd feel about sitting together at a park or something. If she'd like to hold hands. Be nice, be cool, be easygoing. If she says no, back off a little and go back to what you were doing until she warms up.

Otherwise, you really have to ask yourself: does this girl seriously consider you as a "friend" or do you guys just pass each other in the halls? Has she already let you know that she's not interested in a gentler way? Sometimes we see these things, but we don't want to, so we seek advice that basically boils down to trying to find a way to "make" them like us. This never works and always blows up in one's face.

Good luck.

[SpeedyWorm1]

Ok grass I need to ask a favor. I showed the diagram and stuff to my teacher, but we didn't understand it. So I was wondering if you know of a clearer wording of what your supposed to do? This is very important because this is what I want to choose as my science project/maybe science fair, so its VERY important to me.

[Mindslaver]

Well some of you will and some of you won't remember me, but its speedy again with some questions. As some of you know im 13. I get the top grade in science for my school, and this question has been puzzling me and my teacher, for she says it has to do with the Einstien's theory of realtivity and stuff. Why does all mass create gravity? If you eject say a bowling ball and a golf ball into space, the golf ball will be drawn to the bowling ball [if there were no bigger masses anywhere near]. Also is there anyway to prove this? I'd like to chose it for this HUGE project we need to do, and you need something that you can prove.

2nd question: Whats the best way to ask someone out if you never get the chance to ask them in person?

3rd question: What do you do if there's a girl whos like your best friend, and you don't know how she feels about you, but you think you like her as more than a friend?
I understand now! You are trying to apply Einstein's theory of gravity to your love life! You need not look any further.

According to the current theories of gravitation, the more massive something is, the more attractive it is to other things. Therefore, the more massive you are, the more attractive you are. Simply make yourself massive, and so many people will be attracted to you that they'll ask you out first! Elementary physics.
</lame joke>
Here's what you're looking for in Newtonian physics. It's still relatively applicable in constant frames of reference. You need Einstein when things go at the speed of light, but that's rarely necessary for your example.

http://csep10.phys.utk.edu/astr161/lect/history/gravity.gif


Picture space-time as a very elastic, large, square-ish trampoline. If you put a heavy ball on it, it bends the fabric down. Put a little ball next to it, and watch the little ball roll into the big ball. This is essentially what gravity is, according to Einstein. If you put the big ball and the little ball far away from each other, the little ball will barely be affected. If there are tons of objects on the fabric, then you will have a very complicated fabric.

In modern science, this fabric is called the space-time fabric. Look into the aforementioned Newtonian equation. Einstein's conceptual models are better, but Newton's formulae are more applicable to your problem.

EDIT:
Ok grass I need to ask a favor. I showed the diagram and stuff to my teacher, but we didn't understand it. So I was wondering if you know of a clearer wording of what your supposed to do? This is very important because this is what I want to choose as my science project/maybe science fair, so its VERY important to me.
Proving Einstein's equations may not be the best idea for a science fair project, because they have already been proven by him. Re-enacting the Michelson and Morley experiment won't be impressive for a science fair.

[Prozerran]

Well, at 13, I think a more subtle approach is just to hang out with her friends for about a week first. It's almost always a good thing to form good relations with her friends. Once you get her friends to take notice of you as a nice guy, then it becomes easier to approach her in those situations where she's standing around, with her friends... the more comfortable it is for both of you, the better the results usually. It may take some time to work your way into it, so be patient and go with the flow, roll with the punches, and above all, don't ever, ever, ever, under any circumstances -

[Mindslaver]

3rd question: What do you do if there's a girl whos like your best friend, and you don't know how she feels about you, but you think you like her as more than a friend?
I would broach the topic directly. If they are your best friend, then they will not leave you if you express your feelings to them. (Unless you try to force them into sexual things - things can get pretty ugly at that point).

Also, back to the gravity thing, an interesting scientific research project might be anti-gravity (http://www.aeronautics.ru/archive/gravity/gravitsapa.htm). It's a very rapidly developing topic in modern physics.

[SpeedyWorm1]

I would broach the topic directly. If they are your best friend, then they will not leave you if you express your feelings to them. (Unless you try to force them into sexual things - things can get pretty ugly at that point).

Also, back to the gravity thing, an interesting scientific research project might be anti-gravity (http://www.aeronautics.ru/archive/gravity/gravitsapa.htm). It's a very rapidly developing topic in modern physics.


Just to clear things up here guys, I'm 13 years old :mad2:. I know she's not the kind of person to anything sexual anyway [A boyfriend she had for 11 months she only got to 2nd with so......... I dunno. But she's like my best friend but how do I ask her out and still have her be my friend if she says no?