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Work,Power,Waves
By Joe Mihaly, P5
Question | Answer |
---|---|
Force | A push or pull exerted on an object in order to change the motion of the object (measured in newtons). |
Amplitude | The measure of how much energy is being carried by a wave. |
Trough | The lowest point of a wave. |
Crest | The highest point of a wave. |
Mechanical Waves | Waves that require a medium. |
Wave | Specific patterns of water, sound, and light. |
Longitudinal Wave | Particles of the medium move parallel compared to the direction the wave is moving. |
Compression | A region in a longitudinal wave where the particles are closest together |
Rarefaction | A region in a longitudinal wave where the particles are furthest apart. |
Transverse Wave | Particles of the medium move perpendicular compared to the direction the wave is moving. |
Medium | The material through which a wave can travel. |
Electromagnetic Waves | Vibrations of electric and magnetic fields whose waves do not require a medium. |
Wavelength | The distance from any point on a wave to the next identical point on the same wave. |
Frequency | The number of waves that pass a point in a given amount of time. |
Hertz | The measure of frequency. |
Wave Speed | The speed that waves travel. |
Work | The use of force to move an object some distance (measured in joules). |
Power | The rate at which an object moves (measured in watts). |
Cullen pushes a shopping cart with a force of 9.0 newtons in a straight line for 12 meters. How much work was done? | W=F x D W=9.0 N X 12 m 108 J |
A small motor does 8000 J of work in 20 seconds. What is the power of the motor? | P=W/T P= 8000 J / 20 s 400 W |
The speed of a wave is 5 cm/s and the wave travels 50 cm, find the time it took the wave to travel that far? | T=D/S T=50 CM / 5 CM/S 10 SECONDS |
What is the trough in a longitudinal wave? | The rarefaction. |
Which waves require a medium? | Mechanical Waves. |
What is power measured in? | Watts. |
Newtons is the measurement for ______. | Force. |
The rest position of a wave is also known as the _____________. | Line of equilibrium. |