Please help?? How to find density of liquid without performing m/v??

Question

It's part of a grapghing assignment.
Exact Q is:
Find the density of the liquid (hint look at slope of graph and use d = m/v but DO NOT do calcuation for density)

I find this annoying as can get the answer in 10 seconds except they seem to want me to find another way. How?

Please help? I'm completely lost.

Now that would be cheating DocQ..
What exactly do I do to the gradient to get the density? It's all graphed like you said.

Thanks

Answer 1

Lo there,

If you are graphing d = m / v

Then take the gradient of the graph, y / x.

Plot m on the y-axis and v on the x-axis !!

You result is in the form (y = mx + c) where m is the gradient and c is the y-intercept, but you just want the gradient.

If you post your numbers that you have got I will graph it for you and work out the result.

Answer 2

Density can be measured in a number of ways. Solid objects can be weighed to determine their mass and then immersed in a liquid to determine their volume. The volume of liquid displaced by the object is equal to the object’s volume, and the mass divided by the volume is its density. The density of a liquid may be determined similarly. The liquid’s mass can be found by first weighing an empty container, then weighing the container with the liquid in it, and then subtracting the empty weight from the full weight. The liquid’s volume may be determined by instruments similar to the transparent measuring cups used in cooking. Gases may be weighed in airtight containers of known volume and weight. Since gases are more sensitive to changes in temperature and pressure than are liquids or solids, the temperature and pressure must be included in any measurement of the density of a gas.

The term density is also used in many other ways. Population density, for example, is the number of people living within a certain area. Photographic density refers to the blackness of an image on film or on a photographic plate. Particle density is the number of particles in a given volume divided by that volume. Charge density is the total electric charge contained in a volume divided by that volume.