IGCSE REVISION (FORM 4) Flashcards
state the standard scientific units for weight
N (vector)
Density
The amount of mass per unit volume
state the standard scientific units for acceleration
m/s2 (vector)
state the standard scientific units for volume
m3
Isotope
An atom where there is the same number of protons but different number of neutrons
Voltage
The electrical energy difference for 1 Coulomb of charge
state the standard scientific units for power
Watt
Current
The amount of charge flowing in 1 second
state the equation used to calculate force
F (force) = m (mass) x a (acceleration)
state the equation to calculate critical angle
sin (critical angle) = 1 / refractive index
Sin(c) = 1/n
Kinetic Energy
The energy associated with the motion of an object
state the standard scientific units for voltage
V
state the standard scientific units for area
m2
state the standard scientific units for kinetic energy
J
state the equation used to calculate velocity
v (velocity) = D (distance) / t (time)
state the standard scientific units for density
kg/m3
state the equation for law of reflection
i=r
Work Done
The amount of energy changed from one form to another
Acceleration
The change in velocity in 1 second
state the equation used to calculate wave speed
wave speed = frequency x wavelength
v = f × λ
state the equation used to calculate pressure
pressure = force / area
P = F / A
state the equation used to calculate density
density = mass / volume
p = m / V
Longitudinal Wave
A wave where the oscillations are parallel to the direction of the wave
state the standard scientific units for time
s
Transverse Wave
A wave where the oscillations are perpendicular to the direction of the wave
Period
The time for one complete oscillation
Power
The amount work done in 1 second
state the standard scientific units for Pressure
Pa, N/m2
Pressure
The force per unit area
Total Internal Reflection
The reflection of a wave when it meets a boundary at an angle greater than the critical angle