Upthrust is about the upward force exerted by the substance when emerged in fluid. The substance should likely be solid or enclosed like balloon to experience upthrust. To find the upthrust eg 2kg submerged in water, find its volume from its mass and density of water (V = m / d). Then, upthrust = volume of substance x density of water x gravity. Now, paraffin cant likely experience upthrust in water. But, we can determine wether it sink or float on water. With that, we use relative density (RD). RD of paraffin = density of paraffin / density of water. If the RD > 1, then paraffin sinks. If RD < 1, then paraffin floats on water. I hope this helps. Or I may need more clarification
How to find upthrust when you have given the density of water and the any other density eg paraffin??
Upthrust is about the upward force exerted by the substance when emerged in fluid. The substance should likely be solid or enclosed like balloon to experience upthrust.
To find the upthrust eg 2kg submerged in water, find its volume from its mass and density of water (V = m / d). Then, upthrust = volume of substance x density of water x gravity.
Now, paraffin cant likely experience upthrust in water. But, we can determine wether it sink or float on water. With that, we use relative density (RD). RD of paraffin = density of paraffin / density of water. If the RD > 1, then paraffin sinks. If RD < 1, then paraffin floats on water.
I hope this helps. Or I may need more clarification