Measurements and Units

Physical quantities are defined as?

• A quantity that can be measured.

• A quantity that involve physical science.

• Any quantity that is used in Physics.

• Any quantity that remains constant.

SI stands for ___.

• Sports Illustrated

• Scientific Notation

• International System (of measurements)

• Instructional System (of measurements)

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram
• Time - SI unit : Hour
• Electric current - SI unit : Volt
• Temperature - SI unit : Kelvin

What is base quantities ?

• the branch of science concerned with the nature and properties of matter and energy
• the branch of science that deals with the identification of the substances of which matter is composed
• physical quantities that cannot be defined in terms of other physical quantities

What is derived quantities ?

• a tendency to do nothing or to remain unchanged.
• combination of two or more base quantities
• the quantity of motion of a moving body, measured as a product of its mass and velocity.

What are fundamental units?

• Fundamental units are the units that not dependent upon any other units.

• Fundamental units are the units derived from the basic units.

• Fundamental units are the units adopted by the SI

• Fundamental units are the units that we use every day for physic calculations

Which ones are fundamental units?

• Length

• Force

• Luminous Intensity

• Volume

• Electric Current

Which ones are system of units?

• C.G.S.

• S.T.P.

• F.P.S.

• M.K.S.

• K.C.S.

What is the preferred system of unit with world wide acceptance?

• M.K.S. (meter, kilogram, second)

• International System (SI)

• C.G.S. (centimeter, gram, second)

• National System of Units (NSU)

Scientific notation of: 0.000345

• 3.45x10⁴

• 3.45x10^-4

• 34.5x10⁴

• 3.45x10^-5