PHYSICS 101-In which type of wave would you find a rarefraction

PHYSICS 101-In which type of wave would you find a rarefraction

Subject: Physics    / General Physics
Question

In which type of wave would you find a rarefraction?

a. sound wave

b. light wave

c. radio wave

d. water wave

2. Two sound waves of the same frequency and amplitude are broadcast from speakers at opposite ends of a theater. In the middle of the theater, you hear a osund 6 dB louder than that from either speaker. Which of the following is true?

a. The two waves are 180 degrees out of phase in the middle of the theater.

b. The two waves are 90 degrees out of phase in the middle of the theater.

c. The two waves are in phase in themiddle of the theater

d. The two waves are 45 degrees out of phase in the middle of the theater.

3. Your friends hit one end of a 50.0 m long hollow copper pipe with a hammer while you are holding the other end. Which of the following will be true?

a. You will feel the vibration in the copper first.

b. You will hear the sound of the hit first.

c. You will hear the sound and feel the vibration at the same time

d. You will neither hear the sound nor feel the vibration because the pipe is too long.

4.You aim an arrow at a fish in the water and shoot. The arrow misses. The fish was actually below where you aimed. What wave characteristic accounts for this?

a. polarization

b. refraction

c. diffraction

d. interference

5.What part of a standing sound wave does a musician seek in playing a musical note of a specific pitch?

a. He seeks the amplitude of a standing wave.

b. He seeks the node of a standing wave.

c. He seeks the anitnode of a standing wave.

d. He seeks the wavelength of a standing wave.

6. A 0.25 m wave has a frequency of 686 Hz. What is the speed of the wave?

a. 340 m/s

b. 1370 m/s

c. 686 m/s

d. 170 m/s

7. Which type of wave requires no medium?

a. light wave

b. water wave

c. ultrasonic wave

d. sound wave

8.You put on sunglasses that reduce glare on a sunny day. What process allows them to work?

a. refraction

b. polarization

c. diffraction

d. interference

9.A sonar pulse is sent to the ocean bottom at 25 degrees C and it takes 1.20 s for the echo to come back. How deep is the bottom?

<M e d i u m> <m/s>

Air( 0 degrees C) 331

Air(20 degrees C) 343

Helium(0 degrees C) 972

Water(25 degrees C) 1493

Seawater(25 degrees C) 1533

Copper(25 degrees C) 3560

Iron 5130

a. 0.92 km

b.0.90 km

c. 1.84 km

d. 1.79 km

What point of a wave has negative amplitude?

a. crest

b. equilibrium

c. wavelength

d. trough