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# robbie's study stack

What is a wave? The vibrations of a medium
What is a medium? the material which a wave can travel through
What is a transverse wave? when particles move perpendicularly to the direction the wave travels
What is a crest? the point where the wave is highest
What is a trough? the point where the wave is lowest
What is a longitudinal wave? when particles move in the same directions as the wave travels
What is a compression? when an item compresses together
What is a rarefaction? when an item is spread apart
What are mechanical waves? waves that require a medium
What are electromagnetic waves? vibrations of electric and magnetic fields
What is amplitude? the measure of how far particles in the medium move
What is a wavelength? distance from any point on a wave to the next identical point
What is the definition of frequency? number of waves that pass a point in a given amount of time
What is wave speed? the speed waves travel
What is the equation for wave speed? speed =distance/time
What is force? push or pull exerted on an object
What is the unit for force? newton's
What is work? use of force to move something
What is the unit and equation for work? joules, work=force times distance
What is power? the rate at which work is done
What is the equation for power? power=work/time
if 420 joules of work are needed to move a small dog a distance of 2 meters what is the weight of the small dog? the small dog weighs 210 newton's
if a person weighing 200 N gets on an elevator. the elevator lifts the person 10 feet in 20 seconds, how much power was used? 100 watts of power was used to lift the person
What type of wave is sunlight? electromagnetic waves
A guitar is being played, what type of wave is it? electromagnetic wave
what type of wave is firelight? mechanical wave
what type of mechanical energy does an object have when you lift it? potential energy
the mechanical energy of a non moving arrow is mostly ___________ energy. potential
work is the product of a __________ applied to an object and the distance the object moves with or against the force. force
Created by: Robie