Official Physics Thread

Could you be a bit more specific with how you're supposed to show them and what equipment you have available?

An easy way to demonstrate Newton's first two laws would be to have a video of a projectile being launched and plotting its x position vs. time and its y position vs. time. From the first graph you can easily graph the velocity of the object, which will be very close to constant due to Newton's first law, and explain why this is.

For the second graph of y position the velocity won't be constant since there is a force (gravity) acting on the object. You can however calculate the acceleration of the object, which will be constant and close to 9.8m/s, by using the equation dv/dt.

 
Whatever physics course seniors in high school take, like physics 41 or something like that, we just have to do a project explaining each law and giving an example of each one in the real world
 
haha you are a fucking first year physics major and think you actually know shit about physics. I have no idea how the fuck you even define "free will", and don't really give a shit.

you have no idea what quantum mechanics even is. so go study your little physics problems and come back in a few years. idiot.
 
BIO?

Taylor-Swift-Laughing-Gif-taylor-swift-30258989-500-245.gif


you must know so much about the universe...
 
haha now I know you are a troll.

obviously I am just a bunch of chemical structures and reactions. A bunch of very complicated chemical structures and reactions though.
 
I'm currently in physics, it's an awesome degree. For most of the courses the workload is very similar to engineering however most people also find them more challenging so expect to be spending a lot of time in the library.

Physics majors have a very broad range of potential jobs; about a third of physics majors go into research or a job directly related to physics, about another third end up working at engineering firms and a third generally end up in the private sector.

As for pay the median salary for physics majors is usually slightly higher than mechanical engineers however straight out of university you'll most likely be making less than an engineering major.

If your goal is to get into graduate school for physics you'll have to work exceptionally hard as it is very competitive.

Sorry for being so brief, I'm hungover as shit right now and my brain isn't functioning 100% right now. If you have any other questions you can send me a pm, I'm happy to answer any of them.
 
I have to make a skiing video explaining physics forces in action during aerial manoeuvres,

anyone have any help to offer
 
The joke has always been that the smart physics majors switch to engineering and all the dumb ones stay in physics. I know that a bunch of physics majors end up doing a two year diploma after their degree to be more hireable in specific fields so learning other skills is very important. I would say that's pretty common for most degrees though, in Canada university degrees aren't like college degrees in which you are training for a specific career. A physics undergrad gives you a strong skill set in analytical thinking along with math, computer systems and some intro to engineering.
 
I also like to watch very comprehensive videos explaining the answer in layman's terms, and then pretend I'm superiour to those who got the wrong answer before seeing said video.
 
Start with the equations v=sqrt(F/u) where v is the velocity of propagation, F is the tension force and u is the mass per unit length and v=wf where v is the velocity of propagation, w is the wavelength (the notation should be lambda) and f is the frequency.

Combining these equations you get wf=sqrt(F/u), you can rearrange that to get the wavelength.

Also I can't see what the photos you posted are.

Here are the two relevant equations:

257fudu.jpg


of13iu.jpg
 
Start with the equations v=sqrt(F/u) where v is the velocity of propagation, F is the tension force and u is the mass per unit length and v=wf where v is the velocity of propagation, w is the wavelength (the notation should be lambda) and f is the frequency.

Combining these equations you get wf=sqrt(F/u), you can rearrange that to get the wavelength.

Also I can't see what the photos you posted are.

Here are the two relevant equations:

257fudu.jpg


of13iu.jpg
 
The smart physics majors end up going to grad school.

The smart physics majors who realize at the beginning of junior year that grad school is not a good plan, will either switch to engineering, or use their options for more applied type classes. If you are not going to grad school you do not need advanced electromagnetic theory, advanced quantum mechanics, general relativity, etc. You should fill up your schedule with like numerical methods, fluid mech, solids, etc. Courses that will give you at least some experience with the kinda stuff you will be doing after university.
 
Just out of curiosity are you a physics major as well?

I'm in a slightly unique situation where I need a bachelors degree to enter the military however since I've applied for combat trades there actually isn't a degree that is really recommended. I'm not sure if I have mentioned this however I am taking extra engineering, computer science and math courses. Depending on how I feel later on I may complete a secondary degree in engineering or finance or I may do a college diploma if there is a specific career path I would like to take later on.

Thanks for the advice though, it's greatly appreciated.
 
I don't know. if you do what you love you will never work a day in your life right?

astrophysics is ultra competitive. It's right up there with HEP as one of the sexiest fields in science. That being said, if you have a good head on your shoulders and truly love the field, then you can make it happen.

I've never met someone who did a phd in astrophysics and regretted it, even if they moved on to other things. Although in Canada and Europe you don't end up in nearly as much debt.
 
Alright so my post got deleted if anyone wabts to know why heavier people slide faster. Air resistance goes up as a square function, proportional to exposed surface area and shape. Wight goes up as a cube function. So as a person gets heavier, his sa doesnt increase as fast as mass pulling him down.

Also friction on ice is fluid friction afaik so resistance is not directly proportional to mass as it is in solid friction
 
Conservation of energy; more mass -> more force; and I guess once you get going real fast the terminal velocity of the big guy will be higher
 
Anddd I thought you were asking a question. It's late and I have a lab exam tomorrow I'm studying for. Oops
 
12931865:Dirac said:
I don't know. if you do what you love you will never work a day in your life right?

astrophysics is ultra competitive. It's right up there with HEP as one of the sexiest fields in science. That being said, if you have a good head on your shoulders and truly love the field, then you can make it happen.

I've never met someone who did a phd in astrophysics and regretted it, even if they moved on to other things. Although in Canada and Europe you don't end up in nearly as much debt.
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Being in high school at the moment this statement probably doesn't mean much... But if I had to choose a major right now, it would probably be astrophysics. Seems like something I want to do.
 
13004446:elinde said:
Seems like something I want to do.
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if you enjoy physics and math, enjoy reading lots of papers and doing lots of tedius boring work, then go for it. It's very rewarding to find out how things work. However if you are just stoked on the big exciting stuff, you might be just as happy being an amateur astronomer. Those guys often get to see so much more awesome stuff than astrophysicists do, because they have the time.

I know astrophysicists who have not been out stargazing for like a year.
 
This thread blows i was expecting new news or advances in modern physics not people taking about friction on an incline and why no one has pointed up the coaine of the angle and how it's related to the angle of the slope if the ski hill
 
13005058:BlakeG said:
not people taking about friction on an incline and why no one has pointed up the coaine of the angle and how it's related to the angle of the slope if the ski hill
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wtf are you talking about?
 
13005058:BlakeG said:
This thread blows i was expecting new news or advances in modern physics not people taking about friction on an incline and why no one has pointed up the coaine of the angle and how it's related to the angle of the slope if the ski hill
Click to expand...

Surprised this hasn't came up yet but here's something worth talking about... Don't understand much about the mechanics/methods of the experiment but really exciting shit nonetheless
http://www.nature.com/news/quantum-cloud-simulates-magnetic-monopole-1.14612
 
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