# Physics

• Physics
• Mechanics
• Speed=distance/time
• Average Speed=Total distance/total time
• Static Electricity
• When matrials are rubbed together, the material that loses electrons is positively  charged
• The material that gains electrons is negatively charged!
• Charged atoms are called ions
• Charges are the same-
• Charges are opposite+
• One is charged and one is not-
• Current+voltage in circuits
• Electric current is the flow of electric charge
• Calculate the size+ flow of the current
• Current i=q/t    i=amps(current) q=coulombs t=time
• potential difference  v=w/q  v=volts  w=joules q=coulombs (charge)
• If volts are in opposite directions then current is 0V. If they are in the same direction then you add them together.
• Resistance R=IxV        Volts=  ampsXresistance (ohms)
• Power (W) =energy(J) / time (s) Power= Current (a)x volts
• Electricity
• Resistor= Directly proportional
• Diode= high resistance in one direction
• High temp-low resistance-more current flow
• Low temp-high resistance-less current flow
• Filament lamp = swerve
• Blue=left Green = right striped= top