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power flashcards
| Question | Answer |
|---|---|
| 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
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