What is density in physics class 9?
The mass of a unit volume of a substance is called its density. Relative density of a substance is defined as the ratio between the density of the substance to the density of water at 40C. Relative density is also known as specific gravity. The relative density of a substance is a pure number without any unit.
What is density theory?
Density-functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate the electronic structure (or nuclear structure) (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases.
What is the CGS unit of density?
The gram per cubic centimetre is a unit of density in the CGS system, commonly used in chemistry, defined as mass in grams divided by volume in cubic centimetres. The official SI symbols are g/cm3, g·cm−3, or g cm−3. It is equivalent to the units gram per millilitre (g/mL) and kilogram per litre (kg/L).
What is SI and CGS unit of density?
Therefore S. I. unit of density is kg/m3. The C. G. S. unit of mass is gram (symbol g) and of volume is cubic centimetre (symbol cm3 ).
What is the unit of density in MKS system?
In MKS system length is in meter (m), area is in square meter (m2), volume is in cubic meter (m3), time in second (s), mass is in kilogram (kg), weight (force) is in kilogram-meter per second square (kg-m/s2), density is in kilogram per centimeter square (kg/cm2), acceleration is in kilogram-meter per second square ( …
What is CGS and MKS system?
MKS is the system of units based on measuring lengths in meters, mass in kilograms, and time in seconds. MKS is generally used in engineering and beginning physics, where the so-called cgs system (based on the centimeter, gram, and second) is commonly used in theoretic physics. cgs (abbrev.)
What does MKS stand for?
metre, kilogram, and second
Where is CGS system used?
The cgs Gaussian system is nonetheless commonly used in theoretical physics, while the MKS system (based on the meter, kilogram, and second) is commonly used in engineering and physics instruction.
What are the advantages of CGS system?
Answer: That’s useful for chemists who often measure amounts by volume and wish to easily convert to mass. Also most amounts used by chemists are around the range of 1-100 in centimeters and grams. mks units are more convenient for the amounts physicists usually deal with.
What is CGS unit of area?
As in CGS unit we use grams for weight and centi meters in length and seconds for time as we come to area I SI units it is meters square(m^2) and in CGS units it is centi meters square (cm^2) Explanation: laminiaduo7 and 7 more users found this answer helpful.
What is SI and CGS?
In CGS system the unit of length, mass and time are centimetre (cm), gram (g) and second (s), respectively. In SI system the unit of length, mass and time are metre (m), kilogram (kg) and second (s), respectively.
What is the advantages of SI unit over CGS unit?
SI unit is same everywhere as in cgs unit there are different unit of measurement . SI unit is adopted internationally and the units are fixed and do not change at any place.
What is the basic unit of Joule?
The SI unit of energy is the joule (J). The joule has base units of kg·m²/s² = N·m. A joule is defined as the work done or energy required to exert a force of one newton for a distance of one metre.