Section 1
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tangental speed
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Last updated
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Date created
Mar 1, 2020
Cards (80)
Section 1
(50 cards)
tangental speed
The speed of an object in circular motion
Longitudinal waves
A wave vibrating in the direction of propagation.sound travels in longitudinal waves
Doppler Effect
effect is the perceived change in frequemcy of sound due to the relative motion of the source and or the listener
Supersonic
Motion that moves faster than the speed of sound in air
Reflection
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a point 3 times as far from the center of the asteroid, the force will be
40 n
Power
rate at which work is done (work/time)
if you double the frequency of a vibrating object, its period
halves
Momentum
"Mass in motion" (mass x velocity)
Diffraction
describes how waves bend, or change direction, as they travel around the edges of obstacles.
Pitch
The sensation of a frequency. Higher pitch sound corresponds to a higher frequency sound wave and a low pitch sound corresponds to a low frequency sound wave.
Compression (Longitudinal waves)
a region in a longitudinal wave where the particles are closest together
Refraction
change in the direction of waves as they pass from one medium to another. Refraction, or bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. So if the media (or its properties) are changed, the speed of the wave is changed. (occurs in water)
Work
When a force acts upon an object to cause a displacement of the object (F x d x cos)
centripetal acceleration
Acceleration of an object in circular motion that is directed towards the center of the centripetal path. There is a change in directionality, but no change in speed.`
Weight
The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.
Potential Energy
the stored energy of position possessed by an object
Reverberation
produced when the original and the reflected sound wave combine as one very prolonged sound wave
Kinetic Energy
the energy of motion.
Velocity
vector quantity that refers to "the rate at which an object changes its position"
tangental acceleration
Acceleration of an object in circular motion that is directed towards the center of the centripetal path. There is a change in both directionality and tangential speed.
Sound Loudness
Sound loudness is a subjective term describing the strength of the ear's perception of a sound.
Sound
a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water
Frequency
how often the particles of the medium vibrate when a wave passes through the medium.
An opera singer's voice is able to break a thin crystal glass if the singers voice and the glass have the same natural
frequency
Medium
A substance that makes possible the transfer of energy from one location to another, especially through waves.
the two forces that control gravitational force are
mass and radius
What direction is centripetal acceleration directed?
inward
node
a point at which you can touch a standing wave on a rope without disturbing the wave
a tin can whirled on the end of a string and moves in a circle because
there is an inward force acting on the can
momentum is a ..... quantity
vector
Echo
perception of the reflected sound wave.It is observed when the original sound had to travel more than 17m so the original and reflected sounds do not interact at our ear
Sound Intensity
Sound intensity is defined as the sound power per unit area. The usual context is the measurement of sound intensity in the air at a listener's location.
when a sound wave moves toward you the waves speed
stays the same
Mass
The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object.
When the distance between two planets decreases by half, the force between them
increases to four times as much
Force
push or pull upon an object resulting from the object's interaction with another object.
An opera singers voice can break crystal glass is an example of
resonance
Vector
are quantities that are fully described by both a magnitude and a direction.
Torque
influence which tends to change the rotational motion of an object (Fapp x Lever Arm)
Impulse
Change in momentum (mass x time)
a sound wave that has a lower frequency has a wavelength that is
longer
Fundamental Frequency
The lowest frequency produced by any particular instrument
if you whirl a tin can on the end of string and the string suddenly breaks, the can will
fly off, tangent to its circular path
Rarefactions (Longitudinal Waves)
a region in a longitudinal wave where the particles are furthest apart
All simple machines ideally work on the principle that says
work input equals work output
Speed
scalar quantity that refers to "how fast an object is moving"
An object at rest may have?
energy
Scalar
are quantities that are fully described by a magnitude (or numerical value) alone
Vibration
back and forth movement or wiggle of molecules (produces a sound)
Section 2
(30 cards)