Advertisements
Advertisements
प्रश्न
Define the term Density of a substance.
Advertisements
उत्तर
Density of a substance is defined as “Mass per Unit volume”.
Density [d]=`"mass of the substance"/"volume of the substance"`
d=`m/v`
APPEARS IN
संबंधित प्रश्न
The S.I. unit of density is ..........
The relative density of alcohol is 0.8. Its density is
Distinguish between density and relative density.
How is the unit bar related to the S.I. unit pascal?
The diagram below in Fig. 4.12 shows a device which makes the use of the principle of transmission of pressure.
- Name the parts labelled by the letters X and Y.
- Describe what happens to valves A and B and to the quantity of water in the two cylinders when the lever arm is moved down.
- Give reasons for what happens to valves A and B in part (ii).
- What happens when the release valve is opened?
- What happens to valve B in cylinder P when the lever arm is moved up?
- Give a reason for your answer in part (v).
- State one use of the above device.
Complete the following sentence :
Pressure is .................... in all directions about a point in a liquid.
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
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]
The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.
What do you understand by the term “Buoyancy”.
