By mass I assume you mean weight. If a vessel is used to contain the liquid, and the object causing displacement is completely submerged, simply measure the amount of increase in the height of the liquid. Assuming orthogonal wall(s), use the area of the liquid surface multiplied by the change in height to obtain the volume. The displaced liquid weight would be the volume multiplied by the weight per standard unit of the liquid. For example, If I drop an irregular shaped object into a 1 foot diameter bucket of water with a density allowing it to become submerged and there is a 2" rise in the water:
(12/2)²∙Pi=113.10in² (bucket area) x 2in (level increase) = 226.20 in³ (volume.)
To get the weight, find out how much the water weighs per unit volume. In this case I found from a table that water = .036127 lbs per cubic inch, therefore 226.20 in³ X .036127 lb/in³ = 8.1719 lbs.
If you really want to know the actual mass, remove the acceleration from the weight. In this case acceleration due to Earth's gravity is an average of 32.1 ft/s², so 8.1719 lbs / 32.1 ft/s² is .2546 lb∙ft/sec². In the imperial system, the mass would be 0.2546 Slugs.
If there is a way to capture the water displaced by an object, simply calculate the volume and weight of the measured "spill" from the vessel due to displacement.
using water displacement method
displace it
Water Displacement
To find the density of an irregular object, you would first measure its mass using a scale. Next, you would find the volume of the object using displacement method or by calculating it with water displacement. Divide the mass by the volume to calculate the density of the irregular object.
To find the density of an irregular shape, you would first measure its mass using a scale. Then, you would need to measure its volume using a displacement method or by using water displacement. Once you have both the mass and volume, you can calculate density by dividing the mass by the volume.
Eureka Can
Displacement method.... Is the method to find volume of an irregular object
To find out the density of a coin, you would first measure its mass using a scale, and then measure its volume using displacement method or by calculating the volume based on its dimensions. The density of the coin can be calculated by dividing the mass by the volume.
To find the density of a penny, you would measure its mass using a scale, then measure its volume by water displacement or using a caliper to measure its dimensions. Divide the mass by the volume to calculate the density of the penny.
Find the mass using a scale. Find the volume by the water displacement method. Divide mass by volume and that equals density.
You need to find the displacement, easiest way for irregular objects is water displacement. If it can fit in a graduated cylinder use that and find out how much water is displaced when the object is submerged. Then weigh it and divide the weight by the volume. Your unit will be whatever units you weighed it in, say grams, per whatever unit you measured displacement in, say cm.
To find the density of a ball bearing, you would typically measure its mass using a scale and then calculate its volume using a method like water displacement. Once you have both the mass and volume, you can divide the mass by the volume to find the density of the ball bearing.