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# Work-Power-Waves

What is caused by vibrations of a medium? Waves
What is a medium? Material through which a wave can travel.
What do you call it when particles move perpendicularly to the direction a wave travels? Transverse wave
What is crest? The point where the wave is at it's highest.
What is it called where the point in a wave is at it's lowest? Trough
What is a longitudinal wave? A wave where particles move back and forth in the same direction the wave travels.
What is it called when the waves are close together? Compression
What is rarefaction? When the waves are spread out.
What are the kind of waves that require a medium? Mechanical waves
What are electromagnetic waves? Waves that can travel without a medium.
What measures how far particles in the medium move from rest position? Amplitude
What is the wavelength? Distance from one point on a wave to the next identical point on the same wave.
What is the number of waves that pass a point in a given amount of time? Frequency
What is hertz? Frequency measurement equal to one wavelength per second.
What is the speed that the wave travels? Wave speed
What is force? A push or pull exerted on an object in order to change the motion of the object.
What is the use of force to move an object some distance? Work
What is power? The amount of work used in a gem.
What is the unit of measure for force? Newtons
What is the unit of measure for work? Joules
What is the unit of measure for power? Watts
If a group of friends can apply a force of 500 newtons to move a couch 30 meters, what amount of work will they have accomplished? 15,000 joules
How much work is done when holding a 20 N pumpkin, waiting in line for 15 minutes? No work
If one person can apply a force of 125 newtons to move an end table 9 meters, what amount of work will the person do? 1,125 joules
A person getting on an escalator weighing 174 N goes up 6 meters and the escalator lifts the person in 25 seconds, how much power was used? 41.76 watts
If a pulley lifts a 500 N crate 30 meters in 75 seconds, how much power was used? 200 watts
Would the wavelength be greater or smaller if the waves were more compressed? Smaller
Most waves need a medium to travel through, but some don't. What are those two wave categories? Mechanical and electromagnetic
Sound and__________are a couple of examples of energy that can travel through waves. Light
What is done when an object moves through a distance because of a force acting upon an object? Work
If you're holding a 9 N sack of tomatoes and standing in line at the store for 6 minutes, are you able to calculate the work? No
True or false... you need to know the work and the distance to calculate power. False(Only the work and the time.)
Created by: C311493