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# Nickys stack

What is a wave? A disturbance that transfers energy.
What is a Transverse wave? Particles that move perpendicularly the direction the waves travel
What is a medium? A liquid, solid, or gas that a wave can travel through.
What is the Crest of a wave? The highest point on a wave.
What is the trough of a wave? The lowest point on a wave.
What is a longitudinal wave? Particles that move back and forth in the same direction as the wave is traveling.
What is compression? Where particles in a wave are packed together tightly.
What is rarefaction? Where particles in a wave spread apart.
What is a mechanical wave? A wave that requires a medium.
What is a electromagnetic wave? A wave that doesn't require a medium.
What is amplitude? How far the wave is from the resting point to the crest or trough.
What is a wave length? The distance from one exact same spot on a wave to another. Examples are crest to crest or trough to trough.
What is frequency? The number of waves that pass a point in a certain amount of time.
What is a Hertz? What we use to measure frequency.
What is wave speed? The speed the waves travel at.
What is force? A push or pull upon an object in order to change that objects motion. Measured in Newtons (N)
What is work? The use of force to move an object a certain distance. Measured in Joules (J).
What is power? The amount of work used in a certain amount of time. Measured in Watts (W).
A man tries to put a elephant on a escalator. The elephant weighs 3000N. The escalator lifts it 10 meters in 120 seconds. How much power was used? P = 250
A group of football players applying a force of 2400 N to move a football sled 15 meters. What amount of work will they have accomplished? W = 36,000 J
What needs to change in a work equation to decrease the work value? The distance needs to decrease and the force needs to decrease.
What needs to change in a power equation to increase the power value? The work needs to increase and the amount of time it takes needs to decrease.
What needs to change in a power equation to alter the power value? The work needs to either increase/decrease or the amount of time it takes needs to increase/decrease.
What is a difference between transverse waves and longitudinal waves? Transverse waves move back and forward while longitudinal waves move parallel.
Does a mechanical wave need a medium to travel? Yes. Without a medium mechanical waves can not move.
Does a electromagnetic wave need a medium to travel? No. Light can travel through empty space and light is an example of electromagnetic waves.
Created by: NickyP2