JamesJ
 Name:

 School:
 About:
 This month: Australia
188 helpers are online right now
75% of questions are answered within 5 minutes.
Most Active Subjects

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 7
 Medals Received
 6

 Questions Asked
 1
 Questions Answered
 11
 Medals Received
 7

 Questions Asked
 0
 Questions Answered
 3
 Medals Received
 4

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 1

 Questions Asked
 2
 Questions Answered
 12
 Medals Received
 15

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 2

 Questions Asked
 2
 Questions Answered
 0
 Medals Received
 16

 Questions Asked
 0
 Questions Answered
 10
 Medals Received
 7

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 8
 Medals Received
 5

 Questions Asked
 1
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 11
 Questions Answered
 6
 Medals Received
 28

 Questions Asked
 0
 Questions Answered
 4
 Medals Received
 1

 Questions Asked
 13
 Questions Answered
 1065
 Medals Received
 1113

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 3
 Medals Received
 7

 Questions Asked
 1
 Questions Answered
 4
 Medals Received
 4

 Questions Asked
 2
 Questions Answered
 3
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 0

 Questions Asked
 0
 Questions Answered
 2
 Medals Received
 7

 Questions Asked
 2
 Questions Answered
 0
 Medals Received
 3

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 11
 Questions Answered
 2383
 Medals Received
 2676

 Questions Asked
 0
 Questions Answered
 3
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 7
 Medals Received
 6

 Questions Asked
 1
 Questions Answered
 11
 Medals Received
 7

 Questions Asked
 0
 Questions Answered
 3
 Medals Received
 4

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 1

 Questions Asked
 2
 Questions Answered
 12
 Medals Received
 15

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 2

 Questions Asked
 2
 Questions Answered
 0
 Medals Received
 16

 Questions Asked
 0
 Questions Answered
 10
 Medals Received
 7

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 8
 Medals Received
 5

 Questions Asked
 1
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 11
 Questions Answered
 6
 Medals Received
 28

 Questions Asked
 0
 Questions Answered
 4
 Medals Received
 1

 Questions Asked
 13
 Questions Answered
 1065
 Medals Received
 1113

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 0

 Questions Asked
 1
 Questions Answered
 3
 Medals Received
 7

 Questions Asked
 1
 Questions Answered
 4
 Medals Received
 4

 Questions Asked
 2
 Questions Answered
 3
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 1
 Medals Received
 0

 Questions Asked
 0
 Questions Answered
 2
 Medals Received
 7

 Questions Asked
 2
 Questions Answered
 0
 Medals Received
 3

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 11
 Questions Answered
 2383
 Medals Received
 2676

 Questions Asked
 0
 Questions Answered
 3
 Medals Received
 1

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

 Questions Asked
 0
 Questions Answered
 0
 Medals Received
 0

0 
Questions Asked

JamesJ:
Group Title
Here's a very nice question.
Using the standard power series expansion of e^1, evaluate the following limit ...
 updated one year ago
 25 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
Serious physics students,
You might enjoy and learn a lot from this course. I took the first offering and it has really helped sharpen and …
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
A great illustration of pressure from the atmosphere supporting a column of fluid:
http://dailypicksandflicks.com/2011/10/23/koifishenjoy…
 updated one year ago
 4 replies
 1 Medal
Mathematics

JamesJ:
Group Title
The universe is sending us a valentineAsteroid 2012 DA14flies by February 15 as close as 28,000 kms.
Fun facts:
…
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
* Many of the behavior problems that moderators spend time dealing with arise in chat
* A lot of that bad behavior is boring teenage attent…
 updated one year ago
 17 replies
 10 Medals
Mathematics

JamesJ:
Group Title
Here's an interesting integral: the primitive of 1/sqrt( x(1x) )
 updated one year ago
 27 replies
 2 Medals
Mathematics

JamesJ:
Group Title
If you've not already joined the edX bandwagon, you might enjoy this excellent course:
https://www.edx.org/courses/MITx/3.091x/2013_Spring/…
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

JamesJ:
Group Title
For @tomiko
Write out carefully using the 'squeeze theorem' an argument for
\[ \lim_{n \rightarrow \infty} \sqrt[n]{3^{n+17} + 5^n} \]
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
If you've not yet joined the edX bandwagon, you might enjoy this upcoming course, that looks great!
https://www.edx.org/courses/MITx/7.00x/…
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
If you admins aren't going to be here, Moderators should have the power to block an IP.
Twice in the space of an hour this morning, we h…
 updated one year ago
 14 replies
 11 Medals
Mathematics

JamesJ:
Group Title
Hi guys.
If you have not already joined the edX bandwagon, there's a great upcoming physics course:
https://www.edx.org/courses/MITx/8.02…
 updated one year ago
 26 replies
 7 Medals
Mathematics

JamesJ:
Group Title
Comic book explanation of the Higgs Boson:
http://vimeo.com/41038445
…
 updated 2 years ago
 3 replies
 2 Medals
Mathematics

JamesJ:
Group Title
A very important technical video for anyone who has ever watched Walter Lewin. ;)
http://www.youtube.com/watch?v=1Ai_HCBDQIQ
 updated 2 years ago
 2 replies
 1 Medal
Mathematics

JamesJ:
Group Title
As a reminder: Absolutely no MidTerm Exam discussed is allowed.
https://6002x.mitx.mit.edu/discussion/question/55202/collaborationguide…
 updated 2 years ago
 1 reply
 No Medals Yet
Mathematics

JamesJ:
Group Title
There's a strange quirk with the page name/heading:
…
 updated 2 years ago
 5 replies
 1 Medal
Mathematics

JamesJ:
Group Title
Logarithms can be surprising.
Suppose \( x, y, z > 0 \). Then
\[ x^{\log_y z} = z^{\log_y x} \]
…
 updated 2 years ago
 18 replies
 5 Medals
Mathematics

JamesJ:
Group Title
Anyone taking Cousera's Probabilistic Graphical Models?
 updated 2 years ago
 21 replies
 1 Medal
Mathematics

JamesJ:
Group Title
Who is this mysterious figure (top right?). They move between questions like a shadow and they are not clickable.
 updated 2 years ago
 8 replies
 8 Medals
Mathematics

JamesJ:
Group Title
As is well known, when the Spanish first arrived in the New World, they brought with them a number of diseases that had a serious impact on …
 updated 2 years ago
 5 replies
 9 Medals
Mathematics

JamesJ:
Group Title
I think this is in the queue. But I'd like to put in a plug again for adding the ability to add text to drawing.
 updated 2 years ago
 4 replies
 2 Medals
Mathematics

JamesJ:
Group Title
A nice problem in classical physics:
http://openstudy.com/study?login#/updates/4f42fe64e4b065f388dc742a
 updated 2 years ago
 2 Medals
Mathematics

JamesJ:
Group Title
For Aysegul:
What if temperature as defined by T=a.(mw).(v^2) was not dependent on the molecular weight of the gas, speculate on how the co…
 updated 2 years ago
 4 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
Ponytails ... yes, there's a Physics for them too!
http://physics.aps.org/synopsisfor/10.1103/PhysRevLett.108.078101
 updated 2 years ago
 1 reply
 5 Medals
Mathematics

JamesJ:
Group Title
For Tania08:
At the beginning of the year, Quasar Company's liabilities equal $51,000. During the year, assets increase by $60,000, and at …
 updated 2 years ago
 26 replies
 No Medals Yet
Mathematics

JamesJ:
Group Title
Who's up for a challenge? Show that for all positive \( x, y, z \) we have
\[ \left(\frac{x+y}{x+y+z}\right)^{1/2} + \left(\frac{x+z}{x+y+…
 updated 2 years ago
 17 replies
 6 Medals
Mathematics

JamesJ:
Group Title
Is the earth getting lighter or heavier right now?
…
 updated 2 years ago
 8 replies
 10 Medals
Mathematics

JamesJ:
Group Title
Physics of flying. Interesting.
http://www.telegraph.co.uk/science/sciencenews/9035708/Cambridgescientistdebunksflyingmyth.html
 updated 2 years ago
 9 replies
 3 Medals
Mathematics

JamesJ:
Group Title
For Miranda
All of the following are a form of government except:...
 updated 2 years ago
 22 replies
 2 Medals
Mathematics

JamesJ:
Group Title
For Avavind:
There are K intermediate stations on a railway line from one terminus to another. In how many ways can a train stop at three o…
 updated 2 years ago
 23 replies
 3 Medals
Mathematics

JamesJ:
Group Title
In Physics at least, it seems to take 20 minutes or more before all moderator privileges are given the person with the highest level. Norma…
 updated 2 years ago
 8 replies
 3 Medals
Mathematics
 > Older questions