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Mar
8
answered Child-Langmuir Space Charge Law for Non-Zero Cathode Potential (Non-Zero Initial Electron Velocity)
Feb
21
reviewed Reject geometrical optics
Feb
21
reviewed Reject Why gravity decreases as we go down into the earth?
Feb
12
reviewed Approve Faraday's law in a ring
Feb
11
reviewed Reject What exactly is the difference between radiation and convection?
Feb
4
reviewed Reject Why does the weighing balance restore when tilted and released
Feb
3
awarded  Reviewer
Feb
3
reviewed Approve Are internal combustion engines more efficient on cold days?
Feb
3
reviewed Approve Why do you not get burned when you move your finger (quickly) over a candle flame?
Feb
2
reviewed Reject What is the speed of sound in space?
Feb
1
comment In a positively biased PN junction, where do the injection carriers come from?
If, as you say, you like the answer to your Q1 and Q2, you should accept that post, and then ask Q3 and Q4 in a new question.
Feb
1
reviewed Reject How does gravitational potential energy increase, if field decreases as $h$ increases?
Feb
1
answered How did the Bardeen-Brattain point-contact transistor work?
Jan
31
comment What experiments compete with BICEP 2, and when are their results expected?
@annav: No. Planck measured dust by looking at multiple frequencies, which BICEP2 couldn't do, and the two organizations have now agreed that the signal BICEP2 observed is just dust.
Jan
31
revised Which BICEP2 r value should be compared to Planck's r<0.11?
update with Planck/BICEP2 joint analysis.
Jan
31
comment What experiments compete with BICEP 2, and when are their results expected?
@annav: You have now seen a "5 signal signal" go away...
Jan
31
revised What experiments compete with BICEP 2, and when are their results expected?
update with combined Planck-BICEP2 analysis results
Jan
31
reviewed Approve Can orbital energy be a source of perpetual power?
Jan
31
reviewed Approve How are the Lorentz force, Maxwell's third law and Faraday's law of induction clasically related?
Jan
31
comment How did the Bardeen-Brattain point-contact transistor work?
A free version of Bardeen's Nobel Lecture is available from the Nobel site here: nobelprize.org/nobel_prizes/physics/laureates/1956/… .