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Wave Quest
Use this to study for Quest
Question | Answer |
---|---|
What is a wave? | vibrations caused by a medium |
What is a medium? | the material (solid, liquid, or gas) through which a wave can travel |
What is a transverse wave? | when particles move perpendicularly in the same direction that the wave travels in |
What is the crest? | the highest point in a wave |
What is the trough? | the lowest point in a wave |
What is a longitudinal wave? | when the particles move back and forth in the same direction that the wave travels |
What are mechanical wave ? | waves that require a medium |
What is a wavelength? | a defined distance from any point on a wave to the next identical point on the same wave |
What is a frequency? | a number of waves that pass a point in a given amount of time |
What are hertz? | what frequency is measured in |
What is wave speed? | the speed that waves travel in |
What is an electromagnetic wave? | vibrations of electric and magnetic fields |
What is amplitude? | how far the particles in the medium move under their rest position |
What is force? | a push or pull exerted on an object to change its motion of the object |
What is work? | the use of force to move an object a distance |
What is compression? | energy being transferred to the end by particles being pushed together |
What is rarefaction? | energy being transferred to the end by particles being pulled apart |
What is power? | energy exerted at the rate it was exerted |
If a group of movers can apply a force of 1500 newtons to move a couch 26 meters, what amount of work will they accomplish? | 1500 multiplied by 26 equals 39000 joules of work |
A set of ropes pulling a 1,973 N piano 6 meters in 5 seconds. What power was used? | First you have to find the power by multiplying 1,973 by 6 which equals 11,838. Then to Find the power you have to divide 11,838 by 5 to get your answer which is 2,367.6 watts. |
Why is compression and refraction important in a longitudinal wave? | It moves the energy/air particles to a point that it is able to reach if it is in contact with the wave |
What happens to the medium, when a speaker is projecting sound? | The air particles are refracting and compressing to create the sound that we hear |
Explain how compression and refraction in a longitudinal wave are similar to the crest and trough of a transverse wave. | In a transverse wave the crest and the trough are the highest/lowest point in the wave, so when it curves it is compressing at the top and refracting between the crest and the next trough. |
How much time is needed to produce 923 joules of work, if 83 watts of power was used? | you have to multiply the power and the amount of work done to get how many seconds it was done in. So 923/83= about 11. 12 seconds |
If 178 joules of work is needed to move a sedated loin going into surgery, 15 meters, what force is used? | if you take the work and divide it by the distance you would get the force used, 178/15=about 11.87 N |
Name at least two differences between a longitudinal wave and a transverse wave. | Longitudinal wave: sits at it resting point/ moves parallel Transverse wave:is never at resting point/ moves in a zig-zag motion |