Physical Quantities, Unit And Measurement, Chapter 1 Flashcards
In a pendulum each complete to and from motion is?
One oscillation
What is a scalar quantity
Scalar has only magnitude and no direction
What is a vector quantity
Vector has both direction and magnitude.
What is velocity
Velocity is the rate of change of displacement
SI unit for length
Metre (m)
SI unit for mass
Kilogram (kg)
SI unit for time
Seconds (s)
SI unit for electrical current
Ampere (A)
SI unit for thermodynamic temperature
Kelvin (K)
SI unit for the amount of substance
Mole (mol)
Tera- (T)
10 to the power of positive 12
Giga- (g)
10 to the power of positive 9
Mega- (m)
10 to the power of positive 6
Kilo- (k)
10 to the power of positive 3
Deci- (d)
10 to the power of negative 1
Centi- (c)
10 to the power of negative 2
Milli- (m)
10 to the power of negative 3
Micro- (u)
10 to the power of negative 6
Nano- (n)
10 to the power of negative 9
What are metre ruler and measuring tape used for
To measure the length of an object
What are digital calipers used for
It is to measure the internal and external diameter of an object
What is a digital micrometer screw gauge used for
It is to measure the objects that are to small to be measured by the digital calipers
How to avoid parallax error
Take accurate readings
Scalar Or vector
-Distance
-Speed
-Displacement
-Velocity
-Force
-acceleration
-Weight
-Time
-Energy
-Mass
SCALAR VECTOR
-Distance -Displacement
-speed -velocity
-mass - acceleration
-energy - force
-time - weight
What is distance
The total length covered by a moving object regardless of the direction of motion
What is displacement?
The distance measured in a straight line in a specific direction.
