Units and Measurement_2

What are Physical Quantities? What is the first statement of the video clip?

• PHYSICAL QUANTITIES: All the quantities that can be measured are called physical quantities; like mass, length, time, and temperature

• But what is a physical quantity? If a quantity possess these two properties,then it is a physical quantity:

• Its numerical magnitude and the unit in which it is measured.

• If we say that the height of a student is 165 cm, then it is representing both the properties of a physical quantity,

• i.e. 165 is the numerical magnitude while cm is the unit in which the height is measured.

What are Physical Quantities? What is the second statement of the video clip?

• Remember, if we only state height as 165, then it is not a physical quantity since it does not tell us about the unit

• But what is a physical quantity? If a quantity possess these two properties,then it is a physical quantity:

• Its numerical magnitude and the unit in which it is measured.

• If we say that the height of a student is 165 cm, then it is representing both the properties of a physical quantity,

• i.e. 165 is the numerical magnitude while cm is the unit in which the height is measured.

What are Physical Quantities? What is the third statement of the video clip?

• Remember, if we only state height as 165, then it is not a physical quantity since it does not tell us about the unit

  in which it is measured.

• So it is a must for a physical quantity to have both magnitude as well as unit.

• Its numerical magnitude and the unit in which it is measured.

• If we say that the height of a student is 165 cm, then it is representing both the properties of a physical quantity,

• i.e. 165 is the numerical magnitude while cm is the unit in which the height is measured.

What are Physical Quantities? What is the fourth statement of the video clip?

• Remember, if we only state height as 165, then it is not a physical quantity since it does not tell us about the unit

  in which it is measured.

• So it is a must for a physical quantity to have both magnitude as well as unit.

• Physical quantities are divided into two categories:

• If we say that the height of a student is 165 cm, then it is representing both the properties of a physical quantity,

• i.e. 165 is the numerical magnitude while cm is the unit in which the height is measured.

What are Physical Quantities? What is the fifth statement of the video clip?

• Remember, if we only state height as 165, then it is not a physical quantity since it does not tell us about the unit

  in which it is measured.

• So it is a must for a physical quantity to have both magnitude as well as unit.

• Physical quantities are divided into two categories:

• Base Quantities: Base quantities form the base or foundation

  of other physical quantities.

• i.e. 165 is the numerical magnitude while cm is the unit in which the height is measured.

What are Physical Quantities? What is the sixth statement of the video clip?

• Remember, if we only state height as 165, then it is not a physical quantity since it does not tell us about the unit

  in which it is measured.

• So it is a must for a physical quantity to have both magnitude as well as unit.

• Physical quantities are divided into two categories:

• Base Quantities: Base quantities form the base or foundation

  of other physical quantities.

• In other words, the quantities are the basis with which derived quantities are expressed.

What are Physical Quantities? What is the seventh statement of the video clip?

• These quantities are length, mass, time, temperature, intensity of light, electric current, and the amount of a substance.

• So it is a must for a physical quantity to have both magnitude as well as unit.

• Physical quantities are divided into two categories:

• Base Quantities: Base quantities form the base or foundation

  of other physical quantities.

• In other words, the quantities are the basis with which derived quantities are expressed.

What are Physical Quantities? What is the eighth statement of the video clip?

• These quantities are length, mass, time, temperature, intensity of light, electric current, and the amount of a substance.

• Derived Quantities: Derived quantities, therefore, are those which are expressed in terms of base quantities.

• Physical quantities are divided into two categories:

• Base Quantities: Base quantities form the base or foundation

  of other physical quantities.

• In other words, the quantities are the basis with which derived quantities are expressed.

What are Physical Quantities? What is the ninth statement of the video clip?

• These quantities are length, mass, time, temperature, intensity of light, electric current, and the amount of a substance.

• Derived Quantities: Derived quantities, therefore, are those which are expressed in terms of base quantities.

• These quantities include area, volume, velocity, acceleration,

  force, pressure, momentum, electric charge, electric induction, etc.

• Base Quantities: Base quantities form the base or foundation

  of other physical quantities.

• In other words, the quantities are the basis with which derived quantities are expressed.

What are Physical Quantities? What is the tenth statement of the video clip?

• These quantities are length, mass, time, temperature, intensity of light, electric current, and the amount of a substance.

• Derived Quantities: Derived quantities, therefore, are those which are expressed in terms of base quantities.

• These quantities include area, volume, velocity, acceleration,

  force, pressure, momentum, electric charge, electric induction, etc.

• Before talking about the units which are associated with base and derived quantities,

• In other words, the quantities are the basis with which derived quantities are expressed.