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ENP811S - ENVIRONMENTAL PHYSICS - 2ND OPP - JULY 2022 |
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NAMIBIA UNIVERSITY
OF SCIENCE AND TECHNOLOGY
FACULTY OF HEALTH, APPLIED SCIENCES AND NATURAL RESOURCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION : BACHELOR OF SCIENCE HONOURS
QUALIFICATION CODE: O8BOSH
LEVEL: 8
COURSE: ENVIRONMENT PHYSICS
COURSE CODE: ENP811S
SESSION: JULY 2022
DURATION: 3 Hours
PAPER: THEORY
MARKS: 100
SUPPLEMENTARY/SECOND OPPORTUNITY EXAMINATION PAPER
EXAMINER(S) | Dr Sylvanus A. Onjefu
MOpERATOR: | Pr Shobo A. Babajide
THIS QUESTION PAPER CONSISTS OF 3 PAGES
(Including this front page)
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QUESTION 1
[25]
1.1 Explain the term environmental sustainability.
(5)
1.2 Explain four reasons why many experts in environmental science think that human society
is not operating sustainably.
(8)
1.3 Differentiate between chemical energy and nuclear energy and give one example each.
(6)
1.4 Discuss the three component in solving environmental problems.
(6)
QUESTION 2
[20]
2.1 Describe the Hydrologic Cycle and explain how the cycle important to life on earth.
(6)
2.2 Explain how temperature changes with season.
(6)
2.3 Describe the layer of the atmosphere called the thermosphere and explain its importance
to humans on earth.
(8)
QUESTION 3
[23]
3.1 Differentiate between ionizing and non-ionizing radiation and give two example each.
(6)
3.2 You have been engaged by the ministry of mine and energy as an environmental
physicist. Discuss your advice to the minister, on safety the features of nuclear
power plant.
(7)
3.3 Explain the term radioactive decay.
(3)
3.4 Aradioactive material has a half-life of 10 hours. What fraction of the original radioactive
nuclei will remain after 30 hours?
(7)
QUESTION 4
[32]
4.1 Explain the term aerosol.
(3)
4.2 How is aerosol regarded as a nuisance in air and as a settled or deposited matter?
(5)
4.3 Describe a fog and explain its formation and give one effect to the environment.
(5)
4.4 Explain the effects of air pollution on weather.
(4)
4.5 How does wind affect the concentration of pollutant near a point of discharge?
(5)
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4.6 Define adiabatic lapse rate and explain under the condition of adiabatic lapse rate what
becomes of a smoke plume.
(7)
4.7 What happens on a clear summer day when the lapse rate is super adiabatic?
(3)
END