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1. The acceleration of a simple harmonic oscillator:(UEE:2003)
A. Remains constant during its motion.
B. Remains non-zero.
C. Attains its maximum value when its amplitude is zero.
D. Attains maximum value when its velocity is maximum.
2. A particle that under goes simple harmonic motion has a period of 0.4sec. and an amplitude
of 12mm.The maximum velocity of the particle is:(UEE:2003)
A. 3cm/s.
B. 12cm/s.
c. 9.42cm/s.
D. 18.84cm/s
3. A pipe, 68cm long is open at one end and closed at the other. When air is blown across the
open end sound is produced at 110Hz. What is the velocity of sound along the pipe? (UEE:
2004).
A. 598.4m/s
B. 299.2m/s
C. 334.6m/s
D. 149.6m/s
4. The total energy of particle executing Simple Harmonic Motion is: (UEE:2004)
A. Zero.
B. directly proportional to the amplitude
C. directly proportional to the square of the amplitude.
D. inversely proportional to the square of the amplitude
5. A point source broadcasts sound in to a uniform medium. If the distance from the source is
tripled, how does the intensity change?(UEE:2004)
A. It remains unchanged. C. It becomes one-third as large.
B. It becomes three times larger. D. It becomes one-ninth as large.
6. The loudness of sound changes from L1=30db to L2=60db. What is the ratio of intensities I2/I1 in the two cases? (UEE:2004)
A. 2.
B. 4
C. 600.
D. 1000.
7. If the amplitude of sine wave is doubled, the intensity (UEE:2004)
A. Remains the same.
B. Increases by factor 4.
C. Increases by factor 2.
D. Increases by factor 16.
8. A wave has a speed of 50m/s and a wavelength of 25000m.What is the frequency of the
wave? (UEE: 2005).
A. 2x10-3Hz.
B. 5x102Hz.
C. 6x101Hz.
D. 1.8x106Hz
9. An oscillating system is used to create a succession of waves on a water surface. The rate of
wave generation is one every 0.33 seconds. What is the period of these waves? (UEE: 2005).
A. 0.3 seconds.
B. 2.0 second.
C. 1.0 seconds.
D. 3.0 seconds.
10. An alternating current is represented by I (t) = (10A) sin (100πt).What are the amplitude and
frequency of the alternating current? (UEE: 2005).
A. 100A, 75Hz.
B. 10A, 50Hz
C. 10A, 100Hz.
D. 5A, 25Hz.
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4. DNA can be transferred into maize by using:Anonymous voting
- A. plasmids
- B. the gene gun
- C. Agrobacterium
- D. viruses
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1. Which of the following enzymes cut DNA at a specific sequence?Anonymous voting
- A. DNA ligase
- B. DNA helicase
- C. DNA polymerase
- D. Restriction endonuclease
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I am sharing 'chem model' with you
chem%20model.docx1.64 KB
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The major nutrients in food such as carbohydrates, proteins fats and vitamins are
studied under which major field of chemistry?Anonymous voting
- Analytical chemistry
- Physical chemistry
- Inorganic chemistry
- Organic chemistry
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The major nutrients in food such as carbohydrates, proteins fats and vitamins are
studied under which major field of chemistry?Anonymous voting
- Analytical chemistry
- Physical chemistry
- Inorganic chemistry
- Organic chemistry
25460
The process through which international norms and values become law of country is
known asAnonymous voting
- Adaptation
- Domestication
- Confiscation
- Ratification
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1. In the execution of his responsibilities as head of government, the prime minister of FDRE is accountable to_____.Anonymous voting
- president of the country
- House of Peoples Representatives
- House of the Federation
- Council of minister
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1. Which of the following is correct about morality?Anonymous voting
- it is the study of ethics and behavior
- It analyzes our essential duties and rights.
- It allows individuals to act as they wish
- it tells us how we should act and behave
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