This means that using standard laboratory graduated cylinders
What is the main advantage of using the water displacement method?
What is the main advantage of using the water displacement method to measure the volume of a metal versus using the length measurements?
Water displacement can be used for irregularly shaped metals such as lumps.
Which method of determining density is more accurate?
Archimedes's principle method
is more accurate in the determination of the density. According to this method, the buoyant force that is there on the object is equal to the weight of the fluid that it displaces.
Why is water displacement an effective way of measuring volume?
Find mass using a balance scale, and use water displacement to find the volume of irregular objects. Water displacement works because
the amount of water displaced by an object submerged in water equals the volume of the object
.
Which method of determining volume is more accurate?
A graduated cylinder
should be more accurate than a beaker.
Why is displacement method more accurate?
This means that using standard laboratory graduated cylinders to measure displaced water allows for a
very easy conversion
of the volume of displaced water to the volume of the object. This method is more accurate than measuring water that has spilled out an overflowing beaker.
Why do we need the displacement method?
The displacement method (submersion, or dunking method) can be
used to accurately measure the volume of the human body and other oddly shaped objects by measuring the volume of fluid displaced when the object is submerged
, as illustrated in the figure below.
How does the water displacement method work?
Volume is a measure of the amount of space an object takes up. When
a cylinder is submerged in the water it pushes water out of the way
. If you measure the amount the water level increases, you can find the volume of the water pushed out of the way.
What is the maximum number of significant figures that graduated cylinder can be reported to?
Conclusion: The number of significant figures is directly linked to a measurement. If a person needed only a rough estimate of volume, the beaker volume is satisfactory (2 significant figures), otherwise one should use the graduated cylinder (
3 significant figures
) or better yet, the buret (4 significant figures).
What are two different ways to find density?
Using a vernier caliper or ruler, measure the length, depth and width of the object in centimeters. Multiply these three measurements to find the volume in cubic centimeters.
Divide the object's mass by its volume to determine its density
. Density is expressed in grams per cubic centimeter or grams per milliliter.
What is difference between accuracy and precision?
Accuracy is the
degree of closeness to true value
. Precision is the degree to which an instrument or process will repeat the same value. In other words, accuracy is the degree of veracity while precision is the degree of reproducibility.
Is density an exact number?
Density is usually a measured property of a substance
, so its numerical value affects the significant figures in a calculation. Notice that density is defined in terms of two dissimilar units, mass and volume.
How do you calculate water displacement?
- Formula. D = m / (FW – IW)
- Initial Water Level (mL)
- Final Water level (mL)
- Mass (g)
What are the 5 steps for finding volume using water displacement?
- Step 1: Fill your graduated cylinder about halfway with water.
- Step 5: WRITE DOWN YOUR UNITS! …
- Step 2: Write down the initial water level before placing the object in the cylinder. …
- Step 4: Take your new/final water level and subtract that measurement from the initial water level.
How can displacement be calculated?
- If an object is moving with constant velocity, then.
- Displacement = velocity x time.
- If an object is moving with constant acceleration then the equation of third law of motion used to find displacement:
- S = ut + 1⁄2 at2
- S = v2−u22a.
- If v = final velocity,
- u = Initial velocity.
- s = displacement.
