Definitions :) Flashcards
Velocity?
Velocity is change of displacement per unit time.
Acceleration?
Acceleration is the rate of change of velocity
OR
Change of velocity per unit frame
GPE
Energy stored in an object when it is placed at a height
CPE ( Chemical potential energy)
energy that is stored in food, the chemical bonding of a substance
Principal if conversion of energy
Energy cannot be created or destroyed but it can be converted from one form to another. The total energy in the system remains constant.
Define density
its mass per unit volume
Displacement
the shortest length from start to finish in the direction towards
Refractive index
Refractive index in the ratio of speed of light in vacuum to the speed of light in the medium
Focal length
Focal length is distance between the optical centre and the object
work done
work done by a constant force is the product of the force and the distance moved in the direction of the force
radiation
radiation does not require a medium for heat energy to transfer
heat convection
is the transfer of thermal energy by means of currents in a fluid due to difference in density.
Principal of moments?
the moment of a force is the product of the force f n the perpendicular distance from the pivot to the line of action of the force
sound?
Sound is a form of energy that is transferred from 1 pt to another as a longitudinal wave
Charge definition
a measure of total current that flowed within a certain period of time
