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Energy Test

QuestionAnswer
Wave Vibrations in a medium
Medium the material through which a wave can travel
Transverse wave a wave which the object moves up and down as the wave passes
Crest the points where the wave is the highest
Trough the points where the wave is the lowest
Longitudinal wave a wave which the particles move back and forth in the same direction the waves travel
Compression when you compress the wave closer toghether
Rarefaction when you spread the wave apart
Mechanical waves waves that require a medium
Electromagnetic waves waves that can travel without a medium
Amplitude the measure of how far particles in the medium move from their rest position
Wave length the distance over which the shapes repeat
Frequency the number of waves that pass a point in a given amount of time
Hertz What frequency is measured in
Wave speed the speed that waves travel
What is the equation for wave speed? wave speed=wave length divided by wave period
Force a push or pull exerted on an object in order to change the motion of an object newtons
Work the use of force to move an object some distance
What is the unit of measurement for work? Joules
What is the equation for work? Work=force times distance
Power a strong force
A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber? 90,000 J
Angela uses a force of 25N to lift her grocery bag while doing 50 J of work. How far did she lift the grocery bags? 2m
A machine does 40 J of work in 10 seconds. How much power is that? 4 watts
What is power measured in? Watts
A machine does 30 J of work in 10 seconds. How much power is that? 3 watts
Give an example of a medium. Slinky, sound particles
Mariah hears the orchestra play in a concert. What kind of wave would the sound travel through? Longitudinal wave
What kind of wave would your heart rate show? Transverse wave
What would be the medium in a sound wave? Sound particles
A wave with a frequency of 60 Hz travels through steel with a wavelength of 85.5 m. What is the speed of this wave? 510 m/s
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Created by: MissGroundhog
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