2. Describe the motion of point 3 as the wave passes going to the right. Ans. Up- down-up,etc.

3. Black hole Close-up of central region near black hole Side A Side B The picture on the right is a close-up of the central region in the picture on the left. Based on the frequency shift, which side is rotating away from Earth? Ans. B

4. A bat sends an ultrasonic wave that bounces off of a frog and returns 0.006 s later. If the speed of sound is 330 m/s, how far is the frog from the bat? Ans. 0.99 m

5. What is one wavelength? 0.25 m Ans. 0.5 m

6. A sonic measuring device registers a distance of 3.45 m between the device and the wall. If the speed of sound in the room is 340 m/s, how long did the round trip of the signal take? Ans. 0.02 s

7. The speed of sound is fastest in Solids Liquids Gases Ans. solids

8. In an experiment, a tube is pulled out of water as a 550 Hz tuning fork rings over the open end. A resonance is heard. The tube is then pulled out a distance of 0.30 m and the next resonance is heard. What is the speed of sound in the tube? Ans. 330 m/s

9. In what direction is the truck moving? Ans. right

10. Which side of the tornado is moving toward the radar unit? Ans. A

11. Noise-cancellation headphones work by __________ interference Ans. destructive

12. Tuning fork A and B are the same frequency. A small piece of putty is added to fork B. What will happen to the frequency of tuning fork B? A B Ans. decrease

13. The top two frequencies are played and produce the beat frequency shown in red. What is the difference in the top two frequencies? 1 s 2 s Ans. 1 Hz

14. What harmonic is shown? Ans. 3 rd

15. It takes 10 seconds for 5 complete waves to pass a point. What is the frequency? Ans. 0.5 Hz

16. A light wave is shown below traveling to the right. The electric field part of the wave vibrates up- and-down. What type of wave is a light wave? Ans. transverse

17. Is the wave pulse produced in “Domino toppling” transverse, longitudinal, or both? Ans. both

18. Describe the motion of point 3 after the wave reflects from the wall and moves toward the left. Ans. Down- up-down, etc.

19. What harmonic is shown? Ans. 1 st

20. When looking at the light from a distant star, the light is shifted as the star moves in the circular path due to the gravity of the small unseen planet. Does the star rotate clockwise or counterclockwise in the diagram below? Ans. Counter-clockwise

21. If the speed of light is 3 x 10 8 m/s, how long does it take light to travel from the Earth to the Moon? The distance between the Earth and the Moon is about 3 x 10 8 m. Ans. 1 s

22. The hollow crest of the dinosaur acts as a pipe with both ends open. If the total length of the chamber is 1.5 m and the creature produces a standing wave in its 3 rd harmonic, what is the frequency of sound produced? Use v sound = 340 m/s Ans. 340 Hz

23. How does the wavelength of the reflected sound wave measuring blood speed compare to the incident sound wave? Ans. longer

24. What harmonic is shown? Ans. 2 nd

25. Eight waves pass a point every 3 seconds. The distance between crests is 2 m. What is the frequency of the wave? Ans. 8/3 Hz

26. Eight waves pass a point every 3 seconds. The distance between crests is 2 m. What is the speed of the wave? Ans. 5.33 m/s

27. It takes 10 seconds for 5 complete waves to pass a point. What is the period? Ans. 2 s

28. A 550 Hz tuning fork rings along with another fork (A) of unknown frequency. A beat with a frequency of 5 Hz is heard. A third fork of frequency 540 Hz produces a beat frequency of 15 Hz when ringing with A. What is the frequency of tuning fork A? Ans. 555 Hz

29. The xylophone rings at its lowest frequency. What is the wavelength at this lowest frequency? 20 cm Connecting points Ans. 80 cm

30. Waves on the Sun caused by the eruption of a solar flare. It traveled 1.3 x 10 7 m in one hour. What was the speed of the wave (m/s)? Ans. 3611 m/s

31. What is the ? 5 m Ans. 5 m

32. What are the 3 properties of the image formed? Ans. Real, inverted, larger

33. What are the 3 properties of the image formed? Ans. Real, inverted, same size

34. What are the three properties of the image formed? Ans. Real, inverted, smaller

35. What are the 3 properties of the image formed? Ans. Virtual, upright, larger