_1. Televisions (TV) are a common appliance in many households. The frequency of the TV is on the order of 108 Hz. The wavelengths of the TV are on the order of which of the following? A. kilometers B. meters C. centimeters D.micrometers ______2. The wavelength of the radio with a frequency of 104 Hz is on the order of which of the following: A. kilometers B. meters C. centimeters D.micrometers ______3. Speed of sound in air is a function of which of the following? A.wavelength B. frequency C. temperature D.amplitude ______4. The unit of sound intensity level is: A. decibels B. hertz C. watts D. m/s ______5. A Volkswagen car is approaching a stationary student. For the student, the apparent frequency of the horn in comparison to the actual frequency of the horn: Adecreases B. increases C.resonates D.stays the same E. increases or decreases
- MULTIPLE CHOICE. Read the following items carefully. Write the letter of the BEST answer on the space provided before each number. Use CAPITAL letters.
______1. Televisions (TV) are a common appliance in many households. The frequency of the TV is on the order of 108 Hz. The wavelengths of the TV are on the order of which of the following?
A. kilometers B. meters C. centimeters D.micrometers
______2. The wavelength of the radio with a frequency of 104 Hz is on the order of which of the following:
A. kilometers B. meters C. centimeters D.micrometers
______3. Speed of sound in air is a function of which of the following?
A.wavelength B. frequency C. temperature D.amplitude
______4. The unit of sound intensity level is:
A. decibels B. hertz C. watts D. m/s
______5. A Volkswagen car is approaching a stationary student. For the student, the apparent frequency of the horn in comparison to the actual frequency of the horn:
Adecreases B. increases C.resonates D.stays the same
E. increases or decreases
II. MATCHING TYPE. Match the terms in COLUMN I with the terms in COLUMN II. Write the letter of the BEST answer on the space provided before each number. Options in COLUMN II may be used once, many times or never at all. Use CAPITAL letters.
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COLUMN I
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COLUMN II |
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_____6. AM |
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A. 10 Hz |
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_____7. Audible waves |
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B. Apparent change in frequency |
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_____8. Rarefactions |
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C. Distance between adjacent waves |
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_____9. Buzzing mosquito |
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D. Highest frequency |
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_____10. Ultrasonic waves |
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E. Thermal imaging |
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_____11. UV waves |
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F. 10 000 Hz |
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_____12. Visible light |
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G. Amplitude modulation |
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_____13. Microwaves |
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H. Longest wavelength |
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_____14. FM |
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I. λ = 400 nm to 700 nm |
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_____15. Infrasonic waves |
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J. Compressed region |
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_____16. Radio waves |
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K. Heating food products |
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_____17. Gamma waves |
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L. 40 dB |
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_____18. Infrared waves |
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M. Frequency modulation |
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_____19. Doppler effect |
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N. Low-pressure regions |
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_____20. Wavelength |
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O. Associated to skin cancer |
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P. 25 000 Hz |
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