10 Questions
| Attempts: 164

Questions and Answers

- 1.
**As you enter Kennywood Park through the tunnel, you yell at one of your classmates on the other side of the tunnel. How fast did your voice travel if the air temperature is 20 degrees Celsius?**- A.
331 m/s

- B.
434 m/s

- C.
343 m/s

- D.
313 m/s

- 2.
**What is the fundamental frequency of the tunnel if it is 100 feet long (30.5 meters)? Assume the speed of sound in air is 345 m/s.**- A.
0.862 Hz

- B.
2.83 Hz

- C.
1.72 Hz

- D.
5.66 Hz

- 3.
**List the second and third harmonics of the tunnel.**- A.
11.3 Hz, 17.0 Hz

- B.
5.66 Hz, 8.49 Hz

- C.
3.44 Hz, 5.16 Hz

- D.
1.72 Hz, 2.59 Hz

- 4.
**As you are exiting the tunnel, you hear a car blowing its horn (frequency = 800 Hz) as it passes you on the road above you. If the car is traveling 25 m/s, what frequency do you hear as the car approaches you? (Assume the speed of sound to be 343 m/s)**- A.
746 Hz

- B.
800 Hz

- C.
863 Hz

- D.
858 Hz

- 5.
**As you are exiting the tunnel, what frequency do you hear as a car moves away from you on the road above at 25 m/s while blowing its horn with a frequency of 800 Hz? (Assume the speed of sound is 343 m/s)**- A.
863 Hz

- B.
746 Hz

- C.
858 Hz

- D.
800 Hz

- 6.
**You observe a student playing a ring toss game. If the ring is tossed horizontally at 2 m/s from a height of 1 m, how far will it travel?**- A.
2 m

- B.
1 m

- C.
0.452 m

- D.
0.904 m

- 7.
**After observing the ring toss game, you decide to get a sweet treat. You buy some taffy from the candy store and wonder about the elasticity. If you stretch the taffy a distance of 15 cm using a force of 300 N, calculate the "taffy" constant.**- A.
2000 N/m

- B.
20 N/m

- C.
300 N/m

- D.
5 N/m

- 8.
**While walking to your first ride, you decide to throw a penny in the fountain. Instead, you throw a quarter by accident and decide it is in your financial interest to go after it. You spot the quarter looking down at an angle of 50 degrees to the normal. Remembering that the index of refraction for water is 1.333, what is the angle of refraction for the quarter? (This will help you locate the quarter.)**- A.
50.0 degrees

- B.
64.9 degrees

- C.
42 degrees

- D.
35.1 degrees

- 9.
**You decide to check out your hair in a plane mirror in the restroom. What are the properties of the image that you see?**- A.
Virtual, inverted, same size

- B.
Real, upright, same size

- C.
Real, inverted, same size

- D.
Virtual, upright, same size

- 10.
**You decide to get a drink at the drinking fountain outside the restrooms. As you look down at the fountain, you notice your image is inverted and conclude it is a concave mirror. Where is your face (the object) located with respect to the mirror?**- A.
At the focal point

- B.
Inside the focal point

- C.
At half the radius of curvature

- D.
Outside the focal point