INVESTIGATION 5.2Open your lab book to the first clean page and title it, “Making Waves.” Be sure to make a TOC entry as well.
WHAT DO YOU THINK?How does water move to make a wave?TsunamiStadium Wave
INVESTIGATION 5.2Today we will complete # 1 – 5 of the investigation.By the end of this portion of the lab, you should know and be able to describe: what a transverse wave is what a wave’s amplitude is what happens when two waves add together
KeyWAVES TRANSFER ENERGY Term Alert!How would you define the word “wave”?A wave is a transfer of energy with no net transfer of mass. To transfer energy to the slinky, you used chemical energy stored in your arm muscles to create the mechanical energy of the motion of your hand which was them passed on to the slinky which began moving.
KeyWAVES TRANSFER ENERGY Term Alert!Some waves (like sound waves) must have a medium to pass their energy throughWhat was the medium in our investigation? the slinkyThe word “medium” in this context means a substance through which something else is transmitted or carried on
WAVES TRANSFER ENERGYThe medium for water waves is the surface of the water.Leonardo da Vinci explained this principle by stating, “The wave flees the place of creation, while the water does not.”The medium for sound waves can be the air around us, the ground under us, or even the water in our rivers, oceans, and streams.
WAVE VOCABULARYTo discuss waves effectively, we need a common vocabulary
PG 499 - 501Between the pages of 499 and 501 in your textbook, you will find definitions, diagrams, and examples of each of the vocabulary terms.Define all words + give an example and/or create a diagram for each. Beside each word, put the page number where you found your information.20 minutes independent work
CALCULATING THE SPEED OF A WAVEThe distance the crest of a wave moves in 0.2 seconds is 2 meters. Calculate the speed of the wave.That’s an easy enough problem. But what if you don’t have wavelength and time? What if you have frequency and wavelength?
CALCULATING SPEED USING FREQUENCYAND WAVELENGTHImagine you saw 5 crests pass by in 1 second. You measure the distance between the crests and it is 2 meters. What is the speed?wave speed = wave frequency x wavelengthv = fλ
CALCULATING SPEED USING FREQUENCYAND WAVELENGTHDetermine the speed of a transverse wave with a frequency of 4 Hz, a wavelength of 0.75 meters, and an amplitude of 1.5 meters.