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# power flashcards

power move or travel with great speed or force.
force a push or pull upon an object resulting from the object's interaction with another object
work be engaged in physical or mental activity in order to achieve a purpose or result, especially in one's job; do work.
wave a long body of water curling into an arched form and breaking on the shore.
crest A crest is a point on the wave where the displacement of the medium is at a maximum.
medium the intervening substance through which impressions are conveyed to the senses or a force acts on objects at a distance.
trough A trough is the opposite of a crest, so the minimum or lowest point in a cycle.
longitudinal wave vibrating in the direction of propagation.
compression is a region in a longitudinal wave where the particles are closest together.
Rarefaction Rarefaction is the reduction of an item's density, the opposite of compression.
transverse wave a wave vibrating at right angles to the direction of its propagation.
Mechanical wave a wave that is an oscillation of matter, and therefore transfers energy through a medium
electromagnetic waves one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Amplitude the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.
Wavelength the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Frequency the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second.
Hertz (Hz) the SI unit of frequency, equal to one cycle per second.
Wave speed wave speed = frequency x wavelength. The most commonly used wave speed is the speed of visible light, an electromagnetic wave.
What is the relationship among frequency, wavelength, and wave speed?. The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
. What is the source of all waves? vibrating object. region of variable high and low pressure. wave pattern. harmonic object.
How many Hz are in 10,1000,and 100000 waves past 1second 10 waves go past in 1 second, it is 10 Hz 1,000 waves go past in 1 second, it is 1,000 Hz If 1,000,000 waves go past, it is 1,000,000 Hz
F= 150n D=25m W=? W= F x D W=150 x 25 W= 3,750j
A set of pulleys lifts an 800 n crate 4 meters in 7 seconds. What power was used? 800 x 4= 3,200
After you have found frequency, how do you measure it? You measure it in Hertz (Hz).
W= 250j T= 50sec P=? P= W/T P= 500/50 P= 10 Watts
If a wave has a wave speed of 3 seconds and a frequency of 0.5 Hz, what’s the wavelength? Calculate the Wavelength. (Wavelength = Wave Speed / Frequency) 6 meters.
Created by: jiryng