Anonymous asked: How can I be a writer on sayitwithscience?
At this moment, we’re not sure if we can immediately recruit someone new to the team. There are a few things, however, that you can do to show us your interest:
- Email us! Message us (non anonymously)! Let us know who you are! Tell us about your science interests!
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If things end up going great, you may land yourself a position on the team! Thank you for your interest! This message put a smile on our faces. (:
-Say It With Science
∑ F = ma
… is a differential equation:
where acceleration a(t), velocity v(t), and displacement s(t) are all vectors and functions of time. This equation is second-order in position because the highest derivative is the second time derivative of position. Combined with the right boundary conditions, s(t) (also called the trajectory: path through space and time) can be determined.
This differential equation can be solved one component, or dimension, at a time. Let us focus on one of these, and call it the x component. The equations for y and z can be found exactly the same way.
If the graph of a(t) signifying acceleration in the x direction is constant
then the graph of v(t), the velocity in the x direction, is a straight line with slope a0
and the graph of x(t), the position along the x axis, is a parabola
It is also possible for the acceleration, or either of the initial velocity or initial position, to be negative. Thus the displacement/projectile motion formula is derived.
The contributors have been on a bit of a break, but we’ll be back soon with a new batch of posts. In the meantime, we’d like to get to know our readers!
What subject areas do you study/where are you in your education/what classes are you taking?
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Anonymous asked: Hey sayitwithscience - if I'm not mistaken, the featured post regarding the Higgs boson is a bit misleading; I would think it's too early to draw such a conclusion since the LHC isn't running at full power yet? Here's a bit of info from a quick google search: "...LHC will be shut down at end of 2011 with a view to run at full capacity in 2013" Hope you can clear this up for me ~ thanks!
We can’t seem to find the post you are referring to on the featured section! Sorry!
Perhaps it had something to do with this?
Since the particles accelerators collect a tremendous amounts of events (images of the collisions taken by the detectors), physicists have not yet finished analyzing the data completely to be able to conclude anything about the existence of the Higgs. Rolf Heuer (director general of CERN) himself has told journalists that this conclusion will be drawn by the end of 2011. Even by then, the LHC will still not be running at its maximum power. The reason behind this is because according to theory, the Higgs is supposed to be able to be detected at a certain mass range (114GeV-145GeV) and both the Tevatron and LHC have already reached these energies!
The current plan for the LHC is that from now until about end of October they will continue the proton-proton collisions and from November to December they will collide heavy ions for the ALICE detector. As you have read, at the end of 2011 there will be an “extended technical stop” but after that, the LHC will continue running again until the end of 2012. After that, there will be a prolonged shutdown (roughly 17-19 months) where they will upgrade the Quench Protection System further prepare the LHC to run at even higher energies and luminosity.
The best source of information regarding the LHC is on the Quantum Diaries blog. If anyone has doubts or questions regarding the rumours circulating about the LHC, I recommend that they should consult this site.