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35 Cards in this Set
- Front
- Back
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If displacement is increased by 3, what happens to the velocity? Does it increase or decrease, and by what number?
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Increases by 3. By the same factor as displacement.
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The velocity of a car decreases. Does the acceleration have a negative or positive value?
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Negative
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What is motion of an object in a circular path called?
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Centripetal acceleration
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The magnitude of centripetal acceleration is proportional to what?
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velocity squared a = v squared |
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The magnitude of centripetal acceleration is inversely proportional to what?
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The radius of the curve a = 1/R |
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If a car makes a sharp turn with a large arc (which is double the radius) and doubles the speed, the acceleration is decreased by HALF because of the greater arc.
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Force is proportional to what two things?
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Mass and acceleration F= MA |
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Mass and acceleration are _________________ proportional to each other
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inversely
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Momentum is _____________to both mass and velocity
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proportional
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If several objects have the same mass, the object with the greatest speed has the most ________________
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momentum
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A car that experiences no frictional force is started and caused to move. For the car to continue that motion, the gas pedal would have to be used:
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Not at all
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A spacecraft is traveling in space far from planets. How much force is required to maintain the aircraft's speed?
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None
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What type of wave oscillates perpendicular to the direction of the wave?
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Transverse wave
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What type of wave oscillates parallel to the direction of the wave travel?
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Longitudinal
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What is another name for longitudinal waves?
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compressional or pressure waves
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Regions of compression is called ____________. |
condensations
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What is frequency?
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The number of waves that pass any given point
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What is the period of a wave?
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Period of time in which a wave passes a fixed point
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The period of a wave is the inverse of ____________
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frequency
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What is the definition of a wavelength
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The distance between identical parts of 2 successive waves
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The angle of incidence ='s the angle of _____________
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reflection
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When a wave passes through a a second medium, a different density, or a non-uniform medium, the wave ___________
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refracts (bends)
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If a wave enters a _______________ density, it refracts towards the ___________
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medium of higher, normal
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When does the phenomenon of diffraction occur?
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When waves in a uniform medium bend around the edges of objects or when passing through narrow openings
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Definition of Interference
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The superposition of two waves producing waves of constructive and destructive interference
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Compression waves produce _____________ motions (back and forth, up and down) |
Back and forth
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Transverse waves produces an (back and forth, up and down) motion
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up and down
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Define field
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A sphere of influence in the immediate vicinity of the source and theoretically extending infinity far
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Define Electric field
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A region in which a hypothetical test charge experiences a force
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Is a field a vector or a scalar?
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vector
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The force between 2 charged objects is directly proportional to the _________ of the charges and inversely proportional to the square of the _____________
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size, separation
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Electric field strength E is measured in terms of: Joules/Coulombs Newtons/Coulomb Coulomb/second Coulomb/volt |
Newton/Coulomb
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The inverse square law that describes electrostatic force was named for whom?
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Coulomb
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The discovery that one current carrying wire exerts a force on a second current carrying wire was made by whom?
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Ampere
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The vectors of the magnetic field around a long, straight current carrying wire are ___________ with the wire
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concentric
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