Energy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define force | Is a push or pull exerted on an object in order to change the motion.
Force=newtons
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| Define and give an example to describe work | The use of force to move an object some distance
EXAMPLE: A person pushing a box
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| What is this? High bands of water or sound. | Wave
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| The top of a wave is called? | Crest
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| What is a trough? | The bottom of the waves
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| Define and know what a longitudinal wave looks like. | Energy is transferred from one end of the spring toy to the other going back and fourth.
A longitudinal wave is straight and has compressions and rarefactions.
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| Know where the Compressions are,what wave they are in, and be able to define what it is. | The compressions are when the waves are really close together and they are in a longitudinal wave, and they are where the particles are the closest together.
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| Know where rarefactions are, what wave they are in, and be able to define what they are. | A rarefaction is where the waves are further spread apart and they are in a longitudinal wave, When the particles are more spread out.
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| Define and know what a Transverse wave looks like. | When particles move perpendicularly to the direction the wave travels. It looks like waves going up and down.
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| Waves that require a medium... Give examples of what that require a medium. | Mechanical waves.
music waves,water waves, a towel waving in display.
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| Define Electromagnetic waves and give examples. | They are vibrations of electric and magnetic fields, do not require a medium.
visible light, radio waves, microwaves,x-rays, UV light
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| Define amplitude. | A measure of how far particles in the medium move from their rest position.
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| The distance from any point on a wave to the next identical point... | Wavelength
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| Define frequency | The number of waves that pass a point in a given amount of time, usually one second.
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| Frequency is measured in...? | Hertz, one hertz is is equal to one wavelength per second.
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| Define wave speed | The speed that waves travel. This depends on the properties of a medium.
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| The ability to use force to move an object....? | Power
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| Formula for Work? | W=FxD
W=PxT
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| calculate work.... The runner moved a distance of 5 miles and he had a 25 pound box he had to carry. | W=FxD
W=25x5
W=125j
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| Formula for power? | P=work divided by time
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| Solve for power. If a man moves a large box that weighs 20Newtons 15 meters in 45 seconds how much power was used? | step 1: W=FxD Step 2: P=work divided by time
W=20x15 P= 300/45
W=300j ( P=6.7watts) <--- answer
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| How much time is needed to produce 800 Joules of work if 60 watts of power is used? | T=work divided by power
T= 800/60
(T= 13.3 seconds)<---Answer
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| calculate wave length... 7m= 14m/s Divided by F | F=2 Hertz
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| For a wave to be longitudinal it has to have______ and _______ | compressions and rarefactions
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| A wave with a lot of waves is high or low amplitude | high amplitude
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| A wave with low heights is a high or low amplitude? | Low amplitude
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| We measure the wave length of a transverse wave from ____ to ____ or ______ to ____ | crest to crest or trough to trough
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| We measure wave length in a longitudinal wave from _____ to ____ or ______ to _____ | compression to compression or rarefaction to rarefaction
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