Reputation
780
Next privilege 1,000 Rep.
Create new tags
Badges
3 16
Newest
 Revival
Impact
~23k people reached

Apr
1
awarded  Revival
Mar
9
asked Fallacious derivation of the rocket equation
Oct
24
awarded  Yearling
Oct
12
comment Distance between coils on a massive spring
would the force pulling the bottom of the blue box also be changed to $k(f(x+h)-x-h)-\rho g (x+h)$? In the case $f(x)$ also seams to come out linear... I've also realised another mistake I made: the spring constant $k$ is dependant on the length on the spring
Oct
12
revised Distance between coils on a massive spring
fixed image
Oct
12
comment Distance between coils on a massive spring
Surly the mass above the blue box has no effect on the extension of the spring in the blue box. If we were to cut the spring at the top of the blue box and rigidly attach it somewhere, I have a hard time believing it would "know" about it and the extension on the part in the blue box would change. Is there a book that you might recommend to help me understand this more?
Oct
12
revised Distance between coils on a massive spring
changed title to be more descriptive
Oct
12
asked Distance between coils on a massive spring
Mar
27
comment Time for water wave to reflect
Sorry if i phrased the question wrong. I meant to ask will the bounce be instantaneous? What factors (even small ones) might make it non-instantaneous?
Mar
26
asked Time for water wave to reflect
Mar
9
comment Is there a curve for which a particle restricted to move within it under the gravitational force will always exhibit a pure harmonic motion?
Sorry - a cycloid not a catenary. Here is the relevant wikipedia page
Mar
9
comment Is there a curve for which a particle restricted to move within it under the gravitational force will always exhibit a pure harmonic motion?
If memory serves me right the catenary has this property. I'll will try to find a source or a derevation
Mar
7
comment Distinguishing between solid spheres and hollow spheres (equal mass)
I wouldn't call this the "best" method but it made me smile: if the hollow one is filled with gas you can cool them down and hear the condensed gad sloshing around
Dec
26
revised How can ants carry items much heavier than themselves?
added 1 character in body
Dec
16
awarded  Good Answer
Dec
16
awarded  Mortarboard
Dec
16
awarded  Nice Answer
Dec
16
answered How can ants carry items much heavier than themselves?
Nov
2
accepted Power dissipation in High Voltage Cables
Nov
2
comment Power dissipation in High Voltage Cables
But we can also express it $P=V^2/R$ also making it quadratic in voltage! In the end the current also depends on the voltage.