Can you give me an example
2007-05-24 09:30:10 · 9 answers · asked by latina218bella 1 in Science & Mathematics ➔ Physics
You got it.
The units can be anything you want. A quick example, this 1 gallon of milk here has a mass of about 4kg. That means the density is 4kg/gallon. The point of a density is that you can multiply by a known volume and find its mass. If I have one cubic cm of the milk above, its mass is
M=(density)*volume =4kg*1cm^3/gallon
because we are looking for a mass, we know that cm^3/gallon must be a pure number, (leaving behind kg), since it's a volume/volume and thus has no dimesions. I leave it up to you to find that:
cm^3/gallon=.00026
Thus the mass of one cc of the milk is about .00026*4*kg
or around .0012kg, a.k.a. 1.2g
2007-05-24 09:33:32 · answer #1 · answered by supastremph 6 · 0⤊ 2⤋
it is how compact something is.
For a homogeneous object, the formula Mass/Volume may be used. The mass is normally measured with an appropriate scale; the volume may be measured directly (from the geometry of the object) or by the displacement of a liquid. A very common instrument for the direct measurement of the density of a liquid is the hydrometer. A less common device for measuring fluid density is a pycnometer, a similar device for measuring the absolute density of a solid is a gas pycnometer.
2007-05-24 16:40:48 · answer #2 · answered by DanE 7 · 0⤊ 0⤋
The formula is D=M/V so for example
M=25
Volume=5
So you would divide the mass(25) by the volume(5) and you would get D=5g/cubic centimeters because density is a ration of mass to volume
2007-05-24 16:43:23 · answer #3 · answered by Your best friend 1 · 0⤊ 0⤋
Say you have something that's density is 2g/cubic cenitmetres and its mass is 55 g. To find your volumes just plug the number and solve.
2 = 55/V so multiply by 55 to solve for V
V = 110 cubic centimetres
It works as long as you have two for the three factors.
2007-05-24 16:36:15 · answer #4 · answered by Lady Geologist 7 · 0⤊ 0⤋
well, I don't know myself, but go to www.ask.com and there is a formula for the density=mass/volume. I checked and it seems that you will do better there since you know what you're actually measuring. Good luck!
2007-05-24 16:37:27 · answer #5 · answered by wildwolf60 1 · 0⤊ 0⤋
Take an empty measuring jug and weigh it accurately.
Fill it to exactly 1 litre with distilled water and weigh it again.
You should subtract the jug weight from the reading and get an answer of 1,000 grams.
Therefore the density of pure water is 1000g/L which can be expressed as 1g/mL.
Now repeat this using cooking oil. You'll find the weight of the oil is less than 1 litre of water. This tells you that the density of the oil is lower than that of water ...it is lighter.
(Having done this myself long ago, to show my kids, I found the cooking oil to be 900 grams per litre. (900g/L)).
2007-05-24 19:24:30 · answer #6 · answered by Norrie 7 · 0⤊ 0⤋
You take a 1 cubic centimeter of aluminum and weigh it.
It weighs 2.7 grams
Density =mass/volume
2.7/1 =2.7
If you look up the density of aluminum it is 2.7g/cc
2007-05-24 16:34:56 · answer #7 · answered by science teacher 7 · 0⤊ 1⤋
mass divided by volume yup yup
2007-05-24 16:47:07 · answer #8 · answered by Isabella 2 · 0⤊ 0⤋
Yep
density is how much stuff is fit into a certain volume.
d = m/V
2007-05-24 16:36:09 · answer #9 · answered by mark r 4 · 0⤊ 0⤋