When calculating average density for parts of equal volume, the average density is the simple arithmetic mean of the densities. However, in this case, the masses are different. The calculation involves finding the total mass and dividing by the total volume.
An object is made of two equal parts by volume; one part has density $\rho_0$ and the other part has density $2\rho_0$. What is the average density of the object?
Asked in UPSC NDA 2 2022 · Topic: Physical Properties of Materials (Density and Specific Gravity)
More Physics questions
- A pumpkin weighs 7.5 N. On submerging it completely in water, ¾ L of water gets displaced. The acceleration due to gravity at the place where the pumpkin was weighed is 10 m/s². Which one of the following is the correct value of the density of the pumpkin ?
- At which temperature does liquid water show maximum density ?
- Bleeding from nose is caused when a person is there at :
- If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?
- Bose-Einstein Condensate (BEC) is formed by cooling a gas of extremely low density, about one-hundredthousandth the density of normal air. This is treated as
- Air is filled in vehicle tyres because—
- Why does an iron nail float on mercury while it sinks in water ?
- The maximum density of water is at