meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 8 months |
| seen | 1 hour ago | |
| stats | profile views | 209 |
|
May 4 |
accepted | An accelerating and shrinking train in special relativity |
|
Apr 27 |
answered | Conduction, convection, & radiation examples (besides vacuum flask) |
|
Apr 27 |
comment |
Conduction, convection, & radiation examples (besides vacuum flask) The earth is heated by the sun through radiation. How is there conduction between the Earth and the Sun? |
|
Apr 27 |
comment |
What is meant by cellular in the context of “cellular water”? "All water is made of cells", I don't think so. |
|
Apr 27 |
comment |
Inefficiency Comparison of Car Air Conditioning vs. Open Windows how cool we feel doesn't depend upon temperature alone. We feel cool when we lose energy to the outside environment. If the outside temperature is 30 degrees, our body is 37 degrees and there is a strong wind passing us, then there is more air in contact with the body, which can steal the energy from our body. If however there is no outside air, we will heat up the air around our bodies, and it will take longer for this hot air to be replaced by cooler air. Thus we will feel colder in the wind, despite both scenarios being 30 degrees. |
|
Apr 24 |
comment |
Why is the Planck length the shortest measurable length? Thanks everyone |
|
Apr 23 |
comment |
Multiverse theory and infinite individuals @A4KASH, I have heard that quantum effects dominate at the "planck length", but how can you prove this? Why isn't it twice the planck length that quantum effects dominate? |
|
Apr 23 |
comment |
Multiverse theory and infinite individuals Thanks John. I think I understand the gist of your point which is a good start, however I prefer a more mathematical approaches to understand. I have postd a new question about it here: physics.stackexchange.com/questions/62003/…. So far my thoughts: Energy = hf = hc/wavelength. So as wavelength approaches h, Energy approaches c. So why does energy of c cause a black hole? More detailed answer on the linked question would be much appreciated if you have time. Thanks |
|
Apr 23 |
asked | Why is the Planck length the shortest measurable length? |
|
Apr 23 |
comment |
Multiverse theory and infinite individuals @John, why can't we distinguish separations smaller than the Plank length? |
|
Apr 23 |
comment |
Why is the water on the surface of the Earth? +1 for using pretty pictures. |
|
Apr 5 |
comment |
How hot is the water in the pot? most of my algebraic methods lead to the exponential so I didn't post since you said it didn't work. That is why i came up with the ad hoc. I'm glad to see the exponential works after all. |
|
Mar 28 |
answered | How do you tell what forces do no work? |
|
Mar 27 |
comment |
How long can you survive 1 million degrees? @vsz, I don't believe there is a consensus that the Planck time is the shortest time interval. |
|
Mar 27 |
answered | Movement of man and ladder and their center of mass |
|
Mar 27 |
comment |
Movement of man and ladder and their center of mass This is a very similar problem, but looks at displacement of cm, not velocity. It should be easy to convert from displacement to velocity. It is Problem and solution 23: books.google.com.au/… |
|
Mar 27 |
comment |
Bondi's k factor Thanks for that. I see that line is correct after all. |
|
Mar 26 |
comment |
Help me get out of a speeding ticket Based on the information you gave, you were travelling at 47.8mph at the top of the hill, not 53mph. |
|
Mar 23 |
comment |
Sensible heat question (solving for temperature) No problem, please accept my answer as best. |
|
Mar 22 |
comment |
Sensible heat question (solving for temperature) @Cheryl, please see the edited answer to see how to solve the problem. |
