Measurements, quantities and units.

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

Tags

NGSS.MS-PS2-2

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

Scientific notation of: 3,750,000

• 3.75x10⁶

• 3.75x10^-6

• 3.75x10⁷

• 37.5x10⁷

Methods of measurement

• Direct

• Conductive

• Comparative

• Descriptive

• Indirect

Gross error definition

• This error are due to unknown causes and occur even when all systematic errors have been account for.

• Generally the fault of the person using the instruments; such as incorrect reading, recording or use.

• An error that is not determined by chance but is introduced by an inaccuracy (as of observation or measurement) inherent in the system

Random error definition

• This error are due to unknown causes and occur even when all systematic errors have been account for.

• Generally the fault of the person using the instruments; such as incorrect reading, recording or use.

• An error that is not determined by chance but is introduced by an inaccuracy (as of observation or measurement) inherent in the system

Systematic error definition

• This error are due to unknown causes and occur even when all systematic errors have been account for.

• Generally the fault of the person using the instruments; such as incorrect reading, recording or use.

• An error that is not determined by chance but is introduced by an inaccuracy (as of observation or measurement) inherent in the system