Flashcards
Physics equations year 9
Flashcards do conjunto (9)
- 1What is the equation for wave speed?V= f Lambda
V= velocity of wave (m/s)
f= frequency Hz
lambda= Wavelength m - 2What are the equations for time period?T= I/f
or
f= 1/T
Where T is time and f is frequency - 3What are the equations for efficiency?Efficiency = Useful Energy Output (J) / Total Energy Input (J) (x100%)
OR
Efficiency= Useful Power Out (W) / Total Power In (W) (x100%) - 4What is the equation for power?Power (W) = Energy Transferred (J) / Time taken (s)
- 5What is the equation for specific heat capacity?E = m x c x theta
Where
E= Energy (J)
m= mass (kg)
c= specific heat capacity (J/kg*C)
theta= Temperate change (*C) - 6What is the equation for current?I = Q / t
Where
! = Current (A)
Q = Charge (Coulombs, c)
t= time (s) - 7What is the equation for voltage?V = E/Q
Where
V= Voltage (V)
E= Energy (J)
Q = Charge (Coulombs, c) - 8What is the equation for resistance?R = V / I
Where
R = Resistance (Ohms)
V = Voltage (V)
I = Current (A) - 9What is the equation for speed?Speed (m/s) = Distance (m) / Time (s)