MEASUREMENT/UNIT

Bar is metric but not SI unit of pressure.It is equal to 10∧5 newton/metre∧2.Pascal is the SI unit of pressure.1 bar =10∧5 pascal.

In this question 1 kg/cm∧2 refer to 1 kgf/cm∧2
1 dyne =1.02*10∧-6kgf
and 1 bar=10∧6 dyne/cm∧2
By substituting the value we get
1 bar=10∧6 dyne/cm∧2 =1.02*10∧-6*10∧6 kgf/cm∧2=1.02 kgf/cm∧2

When the shape or size of a matter is changed by applying an external force it is known as strain.Since ,it is in ratio hence it is dimensionless and without any unit.

The amount of oil is measured in cubic metres.
1 barrel=158.9873 litre
1 barrel=0.158987 cubic metre
1 barrel=42 U.S. gallon
1 barrel=34.9723 U.K. gallons

1 Fermimetre =10∧-15
1 Nanometre =10∧-9
1 Angstrom =10∧-10
1 Micron =10∧-6

Cusec is the measure of flow of rate of water and its abbreviation of cubic feet per second (28.317 litres per second).Byte is a unit of digital information in computing and communications that consists of right bits.The Richter magnitude scale assigns a magnitude number to qualify the energy released by an earthquake.

Cusec is the measure of flow of rate of water and its abbreviation of cubic feet per second (28.317 litres per second).Byte is a unit of digital information in computing and communications that consists of right bits.The Richter magnitude scale assigns a magnitude number to qualify the energy released by an earthquake.

Turbidity is described as the opaqueness of a fluid due to the presence of suspended solids and is measured in terms of nephelometric turbidity unit (NTC).The higher the concentration of suspended solids in the water is the dirtier it looks and the higher the turbidity is.

Ozone layer thickness is expressed in terms of dobson units which is measure what is physical thickness would be if compressed in earth atmosphere. 1 Dobson unit is defined to be 0.01 mm thickness at STP (standard temperature and pressure) . The unit is named after G,M.B Dobson ,one of the first scientist to investigate atmospheric ozone.1 Dobson is equal to 2.687*10∧20 molecules of ozone per square metre.

Ozone layer thickness is expressed in terms of dobson units which is measure what is physical thickness would be if compressed in earth atmosphere. 1 Dobson unit is defined to be 0.01 mm thickness at STP (standard temperature and pressure) . The unit is named after G,M.B Dobson ,one of the first scientist to investigate atmospheric ozone.1 Dobson is equal to 2.687*10∧20 molecules of ozone per square metre.