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# Peyton Schwallie

### Work, Power and Waves Study Stack- Koch 7th Grade

What is a wave? A wave is water that moves by particles thru a medium.
What is a medium? A Medium is a solid, liquid, or gas thru which a wave can travel.
Describe a transverse wave Is a wave that the particles move perpendicular to the direction the wave travels.
What is a crest? When a wave is at it's highest point.
What is a trough? A channel used to convey liquid.
Describe a longitudinal wave When the particles move the same direction as the wave.
What is compression? Is an area in a longitudinal wave where the particles are closest together.
What is a rarefaction? Is an area in a longitudinal wave where the particles are furthest apart.
Describe a mechanical wave A wave that requires a medium.
Describe an electromagnetic wave A wave caused by electromagnetic vibrations.
What is amplitude? The measure of how far the particles move in a medium.
Describe wave length The distance between two points of a wave.
Describe what a frequency is A number of waves past a point in a given time.
What are hertz? The measure of the total vibration in a wave.
What is wave speed? How fast or slow a wave travels.
What is force? Strength or energy as an attribute of movement.
What is work? Activity involving physical and mental effort done to achieve a result.
What is power? Physical strength and force exerted by something or someone.
John wanted to move a box. The box was 250 newtons and he moved the box 30 meters. How much work did John do? 7500 Joules.
Peter wanted to pick up his chair and bring it into the other room. He used 600 joules of work and it took him 25 seconds. How much power did he use? 15000 watts.
When you are trying to find power, what two things do you find first? Work and Time.
When you are trying to find work what two things do you need to find first? Distance and Force.
Which uses more power, running or walking up the stairs? Running
When a wave carries more energy is it a higher or lower amplitude? Higher Amplitude.
Two waves at the exact same height, one is low frequency the other is high, which one has more amplitude? The have the same amplitude.
Which wave deals with sound? Longitudinal wave.
Name the parts of a wave? Crest, trough, wavelength, amplitude, and frequency.
The SI unit for work is called? Joule
What does the line of equilibrium look like? As though it were at rest. No energy being transferred.
What is the medium for a sound wave? A solid, liquid or gas.
Created by: PSchwallie