A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.

Relative Density = Weight in water/Loss of weight in water

13/7= 1.86 12/8= 1.5
That's the relative density of each according to oil and water, but I'm not sure how to find the same number for both unless you just average them, then it would be 1.68.

I don't know oh I asked the question na..

Answer

To find the relative density of oil, we need to compare the density of the oil to the density of water. The relative density, also known as the specific gravity, is defined as the ratio of the density of a substance to the density of a reference substance, typically water.

In this case, we are given that the mass of the body is 20g. We also know that the mass of the body in oil is 13g and in water is 12g.

Step 1: Determine the density of water.
The density of water is approximately 1g/cm³. This means that 1cm³ of water has a mass of 1g.

Step 2: Calculate the volume of the body in oil.
To find the volume of the body in oil, we'll use the formula density = mass/volume. Rearranging this formula, we get volume = mass / density.

Volume in oil = Mass in oil / Density of oil = 13g / Density of oil

Step 3: Calculate the volume of the body in water.
Similarly, volume in water = Mass in water / Density of water = 12g / 1g/cm³ = 12 cm³

Step 4: Find the density of the body.
For an object with a constant mass, density = mass/volume. In this case, the mass of the body is 20g and the volume is the same in both oil and water.

Density of the body = Mass of the body / Volume of the body = 20g / (volume in oil + volume in water)

Step 5: Calculate the relative density of oil.
Relative density of oil = Density of the body / Density of water = (20g / (volume in oil + volume in water)) / 1g/cm³

By calculating the ratio, you can determine the relative density of the oil.

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