Find the Density of an Object Immersed in Water & Oil: 32.142857kg/5.612246m3

  • Thread starter Sny
  • Start date
  • Tags
    Fluids
In summary, the object has a mass of 32.142857kg and an apparent mass of 26.530611kg when submerged in water. This gives a volume of 5.612246m3. However, the calculated density of the object is incorrect, possibly due to a mistake in using the calculator.
  • #1
Sny
5
0
An object weighing 315 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 260 N. Immersed in oil, the object weighs 275 N. Find the density of the object in kg/m3.

I found the mass of the object to be 32.142857kg and the apparent mass when submerged to be 26.530611kg. This means the volume would be 5.612246, because the volume of the object is the volume of the displaced water, thus giving me the mass and volume. So, 32.142857/5.612246 is 5.73, yet the answer keeps coming up wrong. What am i doing wrong?
 
Physics news on Phys.org
  • #2
Would it surprise you to know that 32.142857- 26.530611= 6.612246, not 5.612246?
 
  • #3
Yes, because my calculator's telling me otherwise :eek:
 
  • #4
Would it surprise you to know that 32.142857- 26.530611= 6.612246, not 5.612246?

Huh?? I got 5.612246 with calculator and by hand. Maybe you pushed a worng button by mistake when you did it.
 

1. What is the formula for finding the density of an object immersed in water and oil?

The formula for finding density is mass divided by volume (D=m/v). In this case, the mass of the object is 32.142857kg and the volume is 5.612246m3, so the density is 5.73kg/m3.

2. Why is it important to find the density of an object?

Density is an important physical property of matter that helps us identify and distinguish different substances. It can also help us determine the buoyancy of an object and its behavior when immersed in different liquids.

3. How does the density of an object immersed in water and oil differ?

The density of an object immersed in water and oil may differ because each liquid has a different density. Water has a density of 1kg/m3, while oil has a density of approximately 0.9kg/m3. This means that the object will float higher in the oil than in the water.

4. Can the density of an object change when immersed in different liquids?

Yes, the density of an object can change when immersed in different liquids because different liquids have different densities. The density of an object is also affected by its shape and size, so it may vary when placed in different liquids.

5. How can knowing the density of an object help in real-life situations?

Knowing the density of an object can help in various real-life situations. For example, it can help in determining the purity of a substance, identifying unknown substances, and predicting the behavior of objects in different liquids. It is also a crucial factor in industries such as agriculture, construction, and manufacturing.

Similar threads

  • Introductory Physics Homework Help
2
Replies
62
Views
3K
  • Introductory Physics Homework Help
Replies
5
Views
708
  • Introductory Physics Homework Help
Replies
20
Views
3K
  • Introductory Physics Homework Help
Replies
15
Views
795
  • Introductory Physics Homework Help
Replies
2
Views
951
  • Introductory Physics Homework Help
Replies
13
Views
2K
  • Introductory Physics Homework Help
Replies
17
Views
1K
  • Introductory Physics Homework Help
Replies
16
Views
1K
  • Introductory Physics Homework Help
Replies
2
Views
1K
  • Introductory Physics Homework Help
Replies
10
Views
10K
Back
Top