Name: Date: Period: Physics: Waves and Vibrations Review I) Examine the four pendulums in the figure. Order the 1.0 m 1.2 m 1.2 m pendulums from SHORTEST PERIOD (T) to LONGEST PERIOD (T). A D 1.8 m C 3 kg 3 kg 1 kg 2) Examine the four pendulums in the figure. Order the B pendulums from SMALLEST FREQUENCY (f) to 1 kg LARGEST FREQUENCY (1). 3) Pendulum B in the figure undergoes 20 swings per minute. Find the a) Period (T) b) Frequency (f) 4) Examine the wave in this picture: 12 m a) The TYPE of wave is called. A. String b) MARK each complete wave. How many single waves (A) are on the string? c) What is the wavelength (2) m d) Speed (v) if frequency f = 60Hz m/'s 5) Examine the wave in this picture: 6 m a) The TYPE of wave is called. B. Blinky b) MARK each complete wave. How many single waves (X) are on the slinky? c) What is the wavelength () m d) Speed (v) if frequency f=60 Hz m/sWave Data 6) The two graphs show Information about A amplitude amplitude SINGLE WAVE. a) What is the amplitude (A) of the wave? length I'ml b) What is the wavelength (2)? c) What is the period (T) and frequency (f) ? T = f = Hz d) How fast (v) is the wave traveling? ( ans. v = 1 m/'s) 7) Draw the reflection for each wave on the string. String Is String lis DRAW REFLECTION ON DOTTED LINE 8) Three wires are made of identical material, Draw reflectic Draw reflection and thickness, and length (each wire is L = 1 m long). The wires are mounted as shown. Tension in each wire is provided by a hanging mass. Each wire vibrates as shown. B kg a) Which vibrations have the largest wavelength? Order the wires from LARGEST WAVELENGTH (2) to SMALLEST. b) Which wire is vibrating at its fundamental (n=1) frequency (f)? c) Which wire is vibrating at its third (n=3) harmonic? d) What is the wavelength (2) of the vibration in wire A? e) What is the wavelength ().) of the vibration in wire B? ( The speed of waves on wire A is v = 720 m's. What is the frequency (f) of the vibration on wire A? g) If a larger mass caused the TENSION TO INCREASE what happens to the wave variables? (increase 1, decrease ! , or stay the same - ) ? v: A: f: h) If a smaller mass caused the TENSION TO DECREASE what happens to the wave variables? (increase 1, decrease 4 , or stay the same - ] ? v: A: f