Study notes physci 105 less death part 2 Flashcards
wavelength
the distance the wave travels during one period (units in time)
two types of interference
constructive (addition) destuctive (subtraction)
resonance
energy transfer from one object to another
fundamental frequency
longest stnding wave a frequency can make
doppler effect
the apparent shift of sound a moving observer experiences
shock wave or sonic boom
source of doppler effect is moving at or faster than the speed of sound resulting in a wave “pile up”
neucleus
positively charged protons
atoms
negatively charged electrons
2 kinds of charges
like charges repel opposites attract
electrostatic charge
an excess or deficiency of electons gains an electric charge
unit of quantity of charge(q)
coulomb (C)
coulomb’s law
quantity of charge and distance between the charged objects
electric potential energy
charge on object and work done to move it
unit of electric potential difference
Volt
unit of work done
(W) joule
electric current
the flow of electric charge
3 parts of electric circiut
voltage source, continuous path, work accomplished ie volage drop
unit of current
ampere (I) coulomb/second
current occurs with what 2 elements
potential difference, electric field
opposition to curretn
resistance (R)
formula for resistance
R=V/I
unit of potential difference
Volt
unit of resistance
Ohms
ohms law
ohms = volt/amp
what Is the rate of doing work?
power
formula for power
P=W/t
formula for electrical power
P=IV
unit of power
watts
north seeking pole is?
north pole
south seeking pole is?
south pole
transformers
step down or up voltage of alternating current
batteries connected in series
same current , voltages add (fuses and circuit breakers)
batteries in parelell
voltage same each source , current adds,resistance lowered(household circuits)
short circuit
a new path of lesser resistance
formula for resistance in series
Rt=R1+R2+R3+R4
Formula for resistance in parallel
1/Rt= 1/(R1+R2+R3+R4)
units for newton
1N=1kg M per s2
speed of sound at sea level
331 m/s
