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# Wave,Work,Power voc.

### Lillian Malone

What is a wave? A wave is a disturbance that transfers energy.
What is a medium? A medium is the material (solid, liquid or gas) through which a wave can travel.
What is a transverse wave? When particles in a medium are moving perpendicular to the direction the wave is traveling.
What is a crest? The place where the wave is highest.
What is a trough? The place where the wave is lowest.
What is a longitudinal wave? When particles in the medium are moving in the same direction as the wave is moving.
What is compression? The part of a longitudinal wave that moves together, and could be compared to the crest of a transverse wave.
What is rarefaction? The part of a longitudinal wave the releases, or spreads apart, and could be compared to the trough of a transverse wave.
What is a mechanical wave? A wave that requires a medium to travel through.
What is an electromagnetic wave? A wave that does not require a medium to travel through.
What is amplitude? The distance between particles in the medium from their rest position. The disturbance of the wave.
What is wavelength? The distance between any point on a wave and an identical point on the same wave.
What is frequency? The number of waves the pass a point in a certain amount of time, usually a second.
What is a Hertz? A measurement of one wavelength per second.
What is wave speed? The speed that the waves travel.
What is force? Measured in Newtons. A push or a pull excerted on an object to change its motion.
What is work? The use of force to move something. Measured in Joules or Newton Meters. work=force x distance
What is power? Having energy and using it to power yourself or something.
Sally is walking down a hall that is 20 meters long. She applies a force of 22N. How much work did she apply while walking down the hallway? W = F x D 22N x 20m = 440J
Bob is getting his books from his locker. There are 8 books.The force needed for each book is: 5N, 9N, 10N, 3N, 8N, 11N, 7N, and 10N. He then carries them the 20m to science. It takes him 120 seconds total. Calculate the Power. W = F x D 63N x 20m = 1,260J P = W / T 1,260J / 120s = 10.5W
A wave has an amplitude of 5centimeters. From any crest to the nearest trough, it is 9 centimeters. What is the wavelength of this wave? 9cm + 9cm = a wavelength of 18 centimeters
What measurement is measured in Newtons? Force is measured in Newtons.
If you have a wavelength of 14 centimeters, how far is any crest to the nearest trough? 14 / 2 = 7 centimeters from crest to trough/trough to crest
What is the formula for calculating power, and what do you have to calculate before you can get your answer? What is the formula for it? Power = Work / Time but first you have to calculate work: Work = Force x Distance
What can be compared to a crest and a trough in a longitudinal wave? Compression and rarefaction
What can be compared to compression and rarefaction in a transverse wave? Crest and Trough
Which wave has particles in its medium that move perpendicular to the resting point? Transverse wave
Which wave has particles in its medium that move in the same direction as its resting point? Longitudinal wave
Created by: 310986

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