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HNQ
HNQ
8:38 AM
2
Q: Why can we assume that Velocity at the top of large tank is zero?

ZacharyWhen using Bernoulli's Equation we sometimes assume that the velocity is zero if the tank is very large. Why can we do this? Is it because the pressure is assumed to be zero as well?

fluid-dynamics bernoulli-equation
 
HNQ
HNQ
9:28 AM
4
Q: Does Kepler's 3rd law of planetary motion violate the first postulate?

Pat DolanConsider a distant observer traveling at .866 c relative to the solar system along the line that is co-linear with the sun's axis of rotation. According to his/her wristwatch the observer measures the earth's orbital period around the sun to be 730.5 days, correct? But the observer also measures ...

general-relativity reference-frames orbital-motion observers celestial-mechanics
 

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