Well... i think that upthrust is a force that pushes things upwards and dnsity is how much something weighs... or the force that pulls something downwards...or how much heavy something is
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Gravity, because of the structures of gravity, gravity has no measure whereas density has units of mass..
as we know the relation between surface tension and temperature is inverse, and that of temperature and density also has inverse proportion, then it is clear that the '''surface tension is directly proportion to the density'''.
CO2 and N2O are related because they are both gases that have greater density than that of O2
Frequency is equal to inverse of the square root of density. As the frequency of a string for example goes up the density will go down but in a non-linear fashion. That is to create higher and higher frequencies less and less density decreases are required.
Density is measured by mass per volume and the expressed formula is P=M/V where P represents Density, M represents Mass and V represents Volume. Specific density is a measurement of density relative to another substance and the expressed formula is Substance=P substance/ P reference. An example of specific density is measuring salt in ocean water and comparing it to salt in fresh water.