Physical Science Survey Study Guide Test 3
Professor: Florin Lung
Chapter 5: Waves Motion and Sound
Frequency and period are inverse.
T= 1/F ←-------------→ F= 1/T
● Frequency is NOT the time required for one complete cycle.
-Frequency is amount of vibrations that are completed in one second -Unit: Hertz (Hz)
● Sounds that move through air are NOT transverse waves. ● Only pressure waves or longitudinal waves can travel through gases. ● Transverse mechanical waves can only move through solids. ● Longitudinal waves can move through gases, solids, and liquids. ● Sound does NOT travel faster through cold, denser air than through
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warm, less dense air.
● Sound waves travel faster in warm air compared to cool air, solids
compared to liquids, and liquids compared to gases.
● When you increase the energy that goes into starting a vibration, the
● A period is the time required for one cycle of any repeating event ● Longitudinal waves are particles of a material that move back and forth
in the same direction of the wave
● Transverse waves are particles of a material that move up and down
perpendicular to the direction of the wave
● The greater the frequency, the higher the pitch will be.
● Both constructive and destructive sound interference is necessary to We also discuss several other topics like What does propriation mean?
● A resonance takes place at a natural frequency and is an efficient
transfer of energy
● Frequency is the number of cycles that a vibrating object moves through during a time interval of 1 second.
● The frequency of the wave is what is interpreted as pitch. ● The period of a vibrating object is inversely proportional to the
● A wave travels and carries energy.
● An echo and a reverberation is different based on the time interval between the sound reflected and the original sound
Chapter 6: Electricity
● The electrical force is NOT much weaker than the force of gravity.
● An object gaining protons does NOT cause it to become positively charged.
● An object becomes positive by gaining an excess of electrons.
● Doubling the distance between two charged objects will reduce the electrical force by a factor of four.
● A magnetic field is produced around a wire by a charge moving through the wire.
● The attractive force between two unlike charges and the repulsive force between two like charges have the same strength. We also discuss several other topics like How do we integrate digital throughout the entire customer lifecycle?
● Chemical, light, and electrical phenomena involve movement or interactions in the electrons of the atom.
● An object becomes electrostatically charged after the transfer of electrons.
● A unit of electrical charge is called a coulomb.
● A unit of electrical potential difference is called a volt.
● A unit of electrical current is called an amp.
● A watt requires a measure of time.
● Work has the unit of kilowatt-hour.
● Amp and watt are measures of rates.
● Ohm’s law states that the potential difference increases if the current in a circuit increases.
Wave Velocity, v=f λ
Speed of sound, v = 331+ 0.6(T)
Beat frequency, fb= f₂-f₁
Harmonic frequency, fn= nv/2L
Charge of an object, q=ne
Single electron = 1.60 x 10^19 C
Single proton = +1.60 x 10^19 C
q = total charge in coulombs
n = number of extra electrons
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Voltage, V= W/ q
Ampere, I= q/ t …. 1A= 1C/ 1 sec Ohm’s Law, V=IR … R= V/ I … I= V/ R Power, P= IV
Series Resistances, Rtotal= R1 + R2 … Parallel Resistances, 1/Rtotal= 1/R1 + 1/R2 …