Advertisements
Advertisements
Question
Distinguish between density and relative density.
Solution
| Density | Relative Density |
|
1. It is the ratio of mass to volume. D=`("Mass" )/("Volume")`=`m/v` |
It is the ratio of the density of a substance to the density of water. |
| 2. Units are g `cm^-3` or kg `m^-3` | It is a pure quantity. It has no units. |
| 3. Density in kg ` m^-3`=R.D × 1000 |
R.D = Density in g `cm^-3` R.D=`("Density in kg" cm^-3)/1000` |
APPEARS IN
RELATED QUESTIONS
Name the scientist who gave he magnitude of buoyant force acting on a solid object immersed in a liquid.
Relative density of a substance is expressed in g cm-3.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3) body B having density 2520 kg m-3
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body C having density 1100 kg m-3
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
How is the unit bar related to the S.I. unit pascal?
Deduce an expression for the pressure at depth inside a liquid.
Prove that the loss in weight of a body when immersed wholly or partially in a liquid is equal to the buoyant force (or upthrust) and this loss is because of the difference in pressure exerted by liquid on the upper and lower surfaces of the submerged part of body.
A metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into the water contained in a jar. What changes do you expect in the readings of the spring balance? Explain your answer.
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
