Physical Quantities and Measurment

1. Vessels for measuring volume

1.1. Measuring Cylinder Measuring Beaker Eureka Can

2. Density

2.1. mass of a unit volume of that substance

2.1.1. Mass/Volume

3. Density Bottle

3.1. A density bottle is specially designed bottle which is used to determine the density of a liquid

4. Relative Density

4.1. The ratio of the density of the substance to the density of the water

4.2. Symbol is R.D

4.3. R.D.= Density of the substance/ density of water

5. Volume

5.1. Si unit is cubic Metre

5.2. Is measured using Measuring Cylinder

6. Unit of Density

6.1. Unit of Mass/ Unit of Volume

6.2. Si and CGS relationship

6.2.1. 1 Kg m-3=1Kg/1m3=1000g/(100Kgcm)3 =1/1000 g cm-3

7. Upthrust

7.1. the upward force that is exerted by the liquid floating in it

7.2. Si Unit is Newton (N)

8. Time

8.1. Si unit is Seconds

8.2. can be measured using a clock and watches

9. Floating and Sinking

9.1. Principal of floatation

9.1.1. If the weight of the body is acting vertically downwards then the body will sink

9.1.2. If the buoyant force of the liquid is acting vertically upward the body will float

9.2. Law of floatation

9.3. when a body floats in a liquid the weight of the liquid displaced by its immersed part is equal to the total weight of the body