# Tag Info

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Background You would need a very sensitive instrument to measure the daytime vs nighttime difference in g. It is not 0.006 m/s2. It is much, much smaller than that, about $6\times10^{-11}$ m/s^2. Your 0.006 m/s2 is the gravitational acceleration toward the Sun at distance of 1 AU. The Earth as a whole is accelerating sunward at 0.006 m/s2. You cannot ...

6

A couple of decades ago, I put quite a bit of time into building a high-precision differential gravimetry setup using a pendulum. It was a lot more difficult than I'd expected, and I was never very successful. If you want to do differential gravimetry, it would probably be much more doable to measure differences between different heights above the earth's ...

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I understand you want to measure or demonstrate the tidal effect of the Moon (stronger than from the Sun), changing the local gravity acceleration. The gravitational constant is a universal constant, it does not change in time. It is achievable/worth trying, if you have a good workshop. The mid 20th century pendulum gravimeters, which you are trying had the ...

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A particle interpretation of QFT answers most intuitively what happens in particle scattering experiments and why we seem to detect particle trajectories. Moreover, it would explain most naturally why particle talk appears almost unavoidable. [My italics: the answer to your question.] http://plato.stanford.edu/entries/quantum-field-theory/#TakSto The ...

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Your question and this answer are really better suited to the Meta, and I suspect a moderator will be along some time soon to migrate them. But while your question is still here ... An intuitive understanding of GR is extraordinarily difficult to attain. I've been studying GR (as an interested amateur not a pro) for a decade and I still make naive errors ...

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I'm not sure if you're talking about probabilities here but if you are then I found some problems online: 1) In how many ways can 8 people line up for concert tickets? 2) There are 5 women running a race. How many different ways could 1st, 2nd, 3rd place finishers occur? 3) There are 13 members on a board of directors. If they must form a subcommittee ...

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how is the detailed connection between the statement that the length measurement has to be simulanous and the quoted derivation? Sally didn't measure a length, she measured a time and, from that, calculated a length. Both Sally and Sam agree that their relative speed is $v$ so Sally can calculate the distance between the ends of the platform by ...

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Here is a classic problem connected to the computation of the density of states in statistical mechanics. A particle of mass $m$ is confined to a three=dimensional cubical box of side $L$. Quantum mechanically, the energy of the particle can take the following values: $$E(n_1,n_2,n_3)= \epsilon_0 \left(n_1^2 + n_2^2 + n_3^2\right)\ ,$$ where ...

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