For simplicity, take equal volumes of each, and measure which one of them has the greater mass or weight. You can even take different volumes, and just use the definition of density, as mass / volume.
viscous liquid
Yes. Try mixing oil and water.
depends on what your putting the fluid in, in some cases, yes
you mix 2 fluids of 2 diffrent densetis DU
The assumption to design heat exchanger is that it must be a shell and tube device. This device must allow the transfer of heat from one fluid to another without mixing the two fluids.
1) determine the density of the first fluid 2) determine the density of the second fluid step 1) and step 2) are easy. just measure the volume and the mass and use the formula: "density = mass/volume" you can also... ~put the liquids in beakers (same amount in both) ~get a little marble ~drop the marble in one of the beakers ~use a timer to time how long it takes the marble to reach the bottom. ~take the marble out or if you have another marble use that ~drop the marble into the second fluid ~time how long it takes to reach the bottom ~the fluid with the less time should be the one that is denser ( you don't have to use marbles, you can use any other two object that are and weight the same).
In magma mixing reaction take place between two fluids only but in assimilation reaction take place between liquid and solid
gluten
Walter M. Duval has written: 'Numerical study of mixing of two fluids under low gravity' -- subject(s): Mixing, Reduced gravity environments
DIFUSION
you cant
It will likely be uneven and streaked.