9 watt/metere sq
4.5 watt/meter2
9 watt/meter sq
4.5 watt/m^2
No.
No. Density is a characteristic property, so there it is always the same no matter how much of the substance is present.
0.74%
It is simple present tense.
Density is the amount of a substance (mass) present in a specific volume. It is usually expressed in g/cm3, g/mL, kg/m3, kg/L, and so on. The formula for determining density is: Density = mass/volume.
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Electron density is the measure of the probability of an electron being present at a specific location. In molecules, regions of electron density are usually found around the atom, and its bonds.
Density is always present in liquids (and in all matter), you can calculate it by dividing the liquid's mass by it's volume.