2
votes
Is the pressure-gradient force that causes hydrostatic equilibrium entropic, contact, or both?
Two thoughts occur to me.
First, we can model an ideal gas by allowing that there are short-range repulsive forces between molecules (the 'hard spheres' model), and the molecules themselves take up a ...
1
vote
Why is this happening to the milk?
It probably is a surface tension effect with the milk not wetting the plastic surface.
Creating surface requires the input of energy and the reverse is also true.
The milk starts off with a very large ...
1
vote
Shear force oscillating plate
Yes. Simply because no other force can push things in the horizontal direction in this setup.
1
vote
Accepted
A question on Hydraulics from a 19th century book
Take a strong glass tube about three feet in length, and tie over one end a piece of well-soaked bladder. When thoroughly dry, . . . .
The dry bladder provides a stiff and air-tight seal at one end of ...
Only top scored, non community-wiki answers of a minimum length are eligible
Related Tags
fluid-dynamics × 6062flow × 916
pressure × 833
thermodynamics × 500
newtonian-mechanics × 450
bernoulli-equation × 437
homework-and-exercises × 428
fluid-statics × 372
aerodynamics × 365
viscosity × 361
water × 299
navier-stokes × 282
classical-mechanics × 259
turbulence × 253
surface-tension × 243
drag × 239
forces × 238
everyday-life × 204
vortex × 177
waves × 165
acoustics × 159
conservation-laws × 128
continuum-mechanics × 123
computational-physics × 121
air × 121