Chap 2: Density and Pressure of Water Flashcards
1
Q
what is density
A
property of a substance/ the mass per unit volume
2
Q
the S.I. unit of density is
A
kg/m³
3
Q
1g/cm³=_________kg/m³
A
1000 kg/m³
4
Q
Example:
The density of mercury is 13.6 x 10kg/m³. What does it mean?
A
This means that one cubic meter of petrol has a mass of 13600 kilogram
5
Q
what does salt do to the density?
A
the density increases
6
Q
if it’s a hollow object, we use ___________
A
average density
7
Q
water has its ___________ density and _____________ volume at 4°C
A
water has its highest density and smallest volume at 4°C
8
Q
why can fish still live in the winter
A
temperature distribution at the surface and bottom of frozen lake (example) is not the same.
