What are the properties of physical quantities?
A physical quantity possesses at least two characteristics in common. One is numerical magnitude and the other is the unit in which it is measured.
What are the 7 basic physical quantities of measurement?
The seven SI base units, which are comprised of:
- Length – meter (m)
- Time – second (s)
- Amount of substance – mole (mole)
- Electric current – ampere (A)
- Temperature – kelvin (K)
- Luminous intensity – candela (cd)
- Mass – kilogram (kg)
What are the physical quantities of measurement?
In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.
What are the properties of unit of measurement?
The required characteristics of unit are: (i) It should not change with time, place and physical conditions. (ii) It should be easily reproducible. (iii) It should neither be too small nor too large.
Which physical quantity is measured by odometer?
An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car.
What are the two types of physical quantities?
There are two types of physical quantities, elemental quantities and derived quantities.
What are the types of physical quantity?
The seven elemental physical quantities are mass, time, temperature, mole, length, luminosity, and electrical charge. Some derived physical quantities are velocity, heat, density, pressure, and momentum. Extensive physical quantities depend on the amount of substance or the size of the object.
What characteristics should a physical standard have?
Answer: Desirable characteristics of physical standard: 1-A physical standard should be suitable in size and well defined. 2- It should be durable and accurately reproducible at all places. 3- It should be easily comparable experimentally with other similar physical quantities.
What is SI unit of speed?
The SI unit of speed is given in terms of basic units of distance and time. Thus, the SI unit of speed is metre per second or m/s.
What is odometer and speedometer?
speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.
What are types of physical quantity?
There are two types of physical quantities. They are fundamental and derived quantities. Fundamental quantities are quantities that cannot be expressed in terms of any other physical quantities. Eg: Quantities like length, mass, time, electric current, temperature, luminous intensity the amount of substance.